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Artificial intelligence in Ophthalmology

Artificial intelligence (AI) in Ophthalmology


In April 2018, the first-ever autonomous Artificial Intelligence system  was approved by the FDA.

The health care system had been totally constructed around doctors diagnosing, treating, as well as recording outcomes, and it was definitely not ready for autonomous AI, where a computer makes a diagnosis or therapy choice. Guideline, ethics, obligation, medical records, payments, and also quality procedures: none of those aspects were ready to take care of autonomous AI, so we need to conquer these difficulties one at a time. So we welcome honest guidelines for autonomous AI, a path for valuing repayment for autonomous AI based on the novel idea of “AI work,” just how to certify autonomous AI analysis results for clinical quality measures, the legal structure, obligation problems, as well as inputting AI right into clinical records.

What is the experience with artificial intelligence (AI) and also deep learning in ophthalmology?

Deep learning is simply a rebranding of man-made neural networks – a principle that has actually been around since the 1950s. They are computational versions that superficially appear like the brain in the manner in which they process details. They are not pre-designed or pre-specified. You feed them information, such as an electronic picture, containing a matrix of numbers, which are fed right into the layers of a neural network, as well as you educate the neural network to acknowledge certain instances by repeating the process millions of times.
This method is verified to be far more powerful than classical computer system programming methods, where you would basically try to describe the functions of a particular phenomenon by utilizing thousands of lines of code.

AI/Deep Learning in a nutshell is a way to gain from one’s mistakes. The core instrument at the centre of almost all AI formulas is a neural network. Neural networks transform data successively via a network framework into an outcome that can be compared to the proper label of, say, the disease shown in an ocular picture. If the neural network’s outcome is different from the appropriate diagnosis, the neural network is penalized. In the following round of training, it responds to that charge by trying to improve its guessing capacity. This process proceeds iteratively till the neural network has the ability to gradually get the right responses a lot of the times. The desirable, however not ensured, outcome of educating a neural network is called convergence.
One can think of AI as consisting of data science and data engineering. Within this framework, knowledge – such as of disease features – is saved in skilled neural network models, housed in a computing architecture that permits release of the AI solution for use by people such as physicians as well as, ultimately, patients. The training of the neural network models is “data science,” while the construction of architecture to home and serve the skilled model is “data engineering.”
To construct a durable Deep Learning (DL) system, it is important to have two primary components– the “brain” (technical networks – Convolutional Neural Network; CNN) and the “dictionary” or datasets. A CNN is a deep neural network including a cascade of processing layers that look like the organic processes of the animal visual cortex. It transforms the input volume into an outcome volume by means of a differentiable function. Each nerve cell in the visual cortex will certainly react to the stimulation that is specific to a region within a photo, similar to just how the mind neuron would certainly respond to the visual stimuli, which will trigger a particular area of the visual space, called the receptive field. These receptive fields are tied together to cover the whole visual field. 2 courses of cells are discovered in this region – simple and complex cells.
Extensively, the CNN can be split into the input, hidden (additionally called feature-extraction layers) as well as result layers. The hidden layers generally contain convolutional, pooling, fully connected and normalization layers, and the variety of hidden layers will certainly differ for different CNNs. The training as well as development stage is usually split right into training, recognition, and also testing datasets (see below for descriptions). These datasets have to not converge; a picture that remains in one of the datasets (like training) have to not be utilized in any one of the other datasets (like validation). Ideally, this non-intersection needs to encompass patients. The general class distribution for the targeted disease needs to be maintained in all these datasets.
Training dataset: Training of deep neural network is generally carried out in batches (parts) randomly sampled from the training dataset. The training dataset is what is used for optimizing the network weights through backpropagation.
Validating dataset: Validation is utilized for parameter selection and tuning, and also is customarily additionally used to carry out stopping conditions for training.
Testing dataset: Lastly, the reported performance of the AI formula should be calculated specifically utilizing the chosen optimized design weights on the screening datasets. It is important to examine the AI system making use of independent datasets, captured using different devices, population and also clinical settings. This process ensures the generalizability of the system in the medical setups.
The issue with building autonomous AI using CNN in the fashion defined by others is that no one recognizes how such an AI makes its clinical decision. Since the CNN’s efficiency depends entirely on the training information, and also not on any kind of understanding of the disease markers, it is at risk to devastating failing, as we and also others have discovered, in addition to racial and also ethnic bias.
Therefore CNNs as well as other AI algorithms can be made use of in different ways, building AI making use of numerous detectors, each of which detect the markers of disease themselves, which are invariant to race, ethnicity, and also age, as well as combine their outputs to a patient-level clinical result. It is this focus on developing autonomous AI – so it is maximally reducible to characteristics straightened with scientific expertise of human clinician cognition– that seems to have actually made regulatory authorities as well as physicians more comfy with autonomous AI.

Which unmet requirements in ophthalmology can be met by AI – and just how?
Worldwide, there is an aging populace with increased prevalence of illnesses like diabetes mellitus: 25 percent of people over the age of 60 in the European Union have very early or intermediate Age-related Macular Degeneration (AMD). As the earth’s populace gets older, it ends up being more than simply an issue about retinal conditions – it’s a concern that is integral in the aging procedure itself. If you might visualize tools like AI being made use of in every person over 60 in every nation in the world on a regular basis, as part of an evaluation of aging populations and general health and wellness, the extent is huge. If we do not create new and cutting-edge strategies, we’re most likely to be in trouble. It’s not a question of luxury, there’s a necessity to come up with ingenious solutions.
AI has appropriately been compared to electricity in the feeling that it will certainly penetrate and locate applications in basically all locations of human endeavour, including ophthalmology. The even more obvious applications include image classification, like making use of AI to tell whether a fundus photograph illustrates modest Diabetic Retinopathy (DR) or mild DR. The majority of such photo classifications have actually not yet been done, yet they can exist in the future for conditions such as corneal dystrophies or retinal dystrophies. Non-image based ophthalmic disease classification is an area that is essentially untouched thus far; there, the input is not an image, however hereditary, demographic, metabolomic, symptomatologic data, as well as some combination of those. One more broad area of application, as well as one in which RETINA-AI has started work, is in the construction of generative models for latent feature exploration and artificial data generation. There is a myriad of chances there for personalised pharmaceutical development and also synthetic data generation.
By 2050, the globe’s populace aged 60 years and older is estimated to be 2 billion – up from 900 million in 2015 – with 80 percent living in low- and middle-income nations. People are living longer, as well as the speed of aging is quicker than ever. Because of this, there is a need for long-term surveillance of many ocular as well as systemic problems like DR, glaucoma, AMD, as well as cardio problems. Population explosion additionally produces pressure to screen for vital causes of childhood blindness, such as retinopathy of prematurity (ROP), refractive error, as well as amblyopia. For example, diabetic patients need lifelong screening for DR. With nations in Africa having simply one doctor per 300,000 individuals, this is simply not feasible. Hence, AI can significantly enhance the testing rate – although the implementation of such AI technology calls for mindful preparation, facilities and also specialists’ assistance for those with vision-threatening DR.
The abilities of deep learning ought to not be taken as skills. What networks can supply is superb performance in a well-defined job. Networks are able to classify DR as well as identify risk aspects for AMD– but they are not a substitute for a retina specialist.
What are the main barriers to clinical adoption of AI?
Developing an AI formula is currently relatively easy, and analytical AIs are an asset. What is testing is developing AI into a system, aligned with clinical standards, as well as medical decision making, durable as well as simple to use by existing personnel in the centre, in order to relocate specialty care to medical care, or into the community. Instead of having to take a trip to a retina expert, you can currently most likely go to a facility at a grocery store to obtain a diabetic retinal testing. Minimal training in taking good-quality photos and operating a robot camera, and assimilation into the medical care system – this is what really counts if we want to make AI adoption widespread. Most notably, utilizing strenuous validation versus scientific results (instead of comparison to unvalidated medical professionals) for safety, efficiency as well as equity, in a scientifically legitimate, transparent and also accountable means for the whole populace, while guaranteeing patient derived information is utilized fairly and transparently. Currently there is little training on autonomous AI recognition, medical trials, how to compare to clinical results, exactly how to validate human factors. However, it is important that as clinicians, all of us become a lot more familiar with understanding whether a certain independent AI is the appropriate method, suitable for our patients.


It is essential to keep in mind that AI and also deep learning are not magic. There are specific applications where deep learning will function extremely well, however there are numerous others, where it won’t. There is no question of AI replacing ophthalmologists.


Specific AI systems may get a much better reception in specific health care setups. In a public health care setting, struggling with large varieties of individuals, it’s most likely to be a lot more appealing to have something that focuses on clients with a sight-threatening illness, so the quantity of time invested in people with less severe illness is minimized. In a private healthcare setting, you cannot reduce the general number of referrals that are entering into the system. Likewise, any type of brand-new technology needs a pathway to be presented right into the system.

At many clinics, it is found out how curated data is a significant traffic jam for AI jobs. So, clinicians learned exactly how to aggregate and also curate sensory information for the functions of training AI designs, as well as present the technical facilities, so that they can harness the power of the substantial quantities of information that the clinic creates. 

Clinics have learned about issues around using patient information – this is possibly a delicate topic, which calls for care. Many clinics have learnt the use of anonymized professional information from public medical registries and are transparent, keeping patients as well as the general public educated regarding what they’re doing.

They’ve attempted to produce an environment of world-leading AI professionals, to ensure that they can do great deals of novel, early-stage growth of AI systems in an academic setup. They may begin a hundred early-stage projects, however just a minority of those will be translated right into medical procedure, with an industry collaborator.

The largest difficulty to fostering is the interdisciplinarity of the problem at hand. Communication among clinicians, medical managers, regulators, data scientists, and information engineers is vital, but these people commonly speak various languages. The uniqueness of AI technologies also requires time for everybody to come on board as well as comprehend each other’s languages. Regulative barriers are properly in position and rate the deployment of AI into professional usage. There are likewise some engineering challenges to overcome to have full range continuity in understanding and also improvement of systems.

Expense will also play a role; cloud-based systems as well as AI capability are both expensive. All in all, suitable cross-talk and continued improvement will inevitably result in progression because the general forecasted cost-savings and also professional effectiveness is considerably engaging.

The prospective obstacles of AI study and medical fostering in ophthalmology are countless. First, AI strategies in ocular disease need a great deal of photos. Information sharing from different facilities is an evident method to increase the variety of input data for network training, nonetheless, raising the number of data components does not always boost the efficiency of a network. For example, including big quantities of information from healthy subjects will probably not improve the category of disease. Furthermore, very large datasets for training might raise the likelihood of making spurious links. When it comes to using retinal images to forecast and also identify ocular and also systemic illness, a clear guideline for the ideal number of cases for training is needed.

Second, when information is to be shared in between various facilities, policies and state privacy policies require to be taken into consideration. These might vary between countries, as well as while they are made to make certain patients’ personal privacy important, they often form obstacles for efficient research efforts and also patient care. Normally, there is an arrangement that photos and also all various other patient-related information require to be anonymized as well as individual’s authorization has to be gotten before sharing, when possible. The application of the essential options – consisting of information storage space, monitoring, and also evaluation – is time – and cost-intensive. Purchasing data-sharing is a challenging choice, since the economic demands are high, and also the advantage is not immediate. However, all AI research study groups around the world ought to continue to collaborate to correct this obstacle, aiming to harness the power of large information and DL to advance the discovery of clinical understanding.

Third, the decision for data sharing can in some cases may be affected by the concern that competitors might check out novel outcomes initially. This competition can also take place within an institution. Indeed, key efficiency signs (as defined by funding bodies or colleges, consisting of number of publications, outcome variables and citation metrics) may stand for significant obstacles for efficient information sharing. On an institutional level, the filing of collaboration contracts with various other members is a long and labour-intensive method that decreases analysis of shared data. Such periods may also get extended when intellectual property issues are to be negotiated. Given that these are typically multiple-institution agreements, time periods of one year or more are common and may thus extend timelines.

Fourth, a great number of images are required in the training set as well as they require to be well phenotype for various conditions. The efficiency of the network will depend upon the number of photos, the high quality of those pictures, and how representative the information is for the entire range of the disease. Additionally, the applicability in clinical method will depend upon the top quality of the phenotyping system and also the ability of the human graders to follow that system.


Fifth, though the variety of images that are available for conditions such as glaucoma, DR and AMD is sufficient to educate networks, orphan diseases are an issue because of the lack of cases. One method is to create artificial fundus pictures that simulate the disease. This is an uphill struggle and also existing techniques have actually shown to be not successful. Furthermore, it is doubtful that proficient authorities would approve a strategy where information does not stem from genuine patients. Nevertheless, generation of artificial images is a fascinating approach that may have potential for future applications.

Sixth, the abilities of DL should not be understood as proficiency. What networks can offer is exceptional performance in a well-defined task. Networks have the ability to categorize DR and spot threat factors for AMD, yet they are not an alternative to a retina professional. Thus, the inclusion of unique technology into DL systems is tough, since it will need a lot of information with this novel technology. Addition of novel technology into network-based category systems is a lengthy as well as expensive effort. Given that there are several unique imaging strategies imminent, consisting of OCT-angiography or Doppler OCT, this might have considerable capacity for medical diagnosis, category and progression evaluation. And that is a crucial challenge for the future.

Seventh, giving health care is logistically intricate, as well as services vary considerably between different nations. Implementing AI-based options right into such workflows is tough and requires enough connection. A collective initiative from all stakeholders is required, consisting of regulatory authorities, insurance coverages, health centre supervisors, IT groups, doctors, and also patients. Execution needs to be very easy as well as uncomplicated, and also without management difficulties. Quick circulation of outcomes is a crucial element in this regard. An additional step for AI being implemented into a clinical setting is a practical business design that needs to take into consideration the specific rate of interest of the patient, the payer, as well as the insurance supplier. Main factors to be taken into consideration in this regard are repayment, effectiveness, and also unmet medical requirements. Commercial versions also require to take into consideration the long-lasting ramifications, because constant connectivity and also the capability to find out is related to the capacity to improve scientific efficiency over time.

Eighth, there is a lack of moral as well as lawful guidelines for DL algorithms. These problems can take place throughout the information sourcing, product advancement, and also clinical release phase. The intent behind the design of DL algorithms likewise needs to be taken into consideration. One requires to be mindful regarding developing racial biases into the health care algorithms, specifically when the medical care delivery currently differs by race. Moreover, offered the growing relevance of quality indicators for public analyses and also reimbursement rates, there might be a propensity to make the DL formulas that would result in much better performance metrics, however not always much better clinical care for the individuals. Typically, a physician might keep the patient information from the medical record to keep it private. In the era of digital health and wellness records incorporated into the deep-learning-based choice support, it would be difficult to hold back patient’s medical information from the electronic system. Hence, the clinical values in these problems might require to advance with time.


Lastly, the AI system is meant to be an affordable tool for evaluating eye disease. Therefore, this might not be the bottleneck when compared with those other challenges.

For how long before we see actual adjustments in patient results as a result of applying AI/deep understanding?

Autonomous AI solves access, cost as well as quality problems in places where the diabetic person eye examination was previously not easily accessible for people with diabetic issues. We have actually executed the systems at areas where the access time to ophthalmology was half a year or even more. After installing autonomous AI, these health systems can currently give patients eye care with same-day visits. AI has currently identified countless people who have actually been checked for diabetic retinopathy, and a significant percent were found to have diabetic retinopathy, as well as were for that reason referred for additional therapy – which we understand saves sight. As a matter of fact, since the ease of access and also cost aspect of the diabetic eye test has been addressed, we have been focusing on the complete treatment path to ensure enhanced end results.
Things are happening at an exceptionally rapid pace. Besides ophthalmology, autonomous AI is not offered to the public anywhere: you cannot buy a self-driving car and truck yet, you cannot get a financing from a autonomous, unsupervised AI, but you can now obtain a medical diagnosis from an AI system. And also, patients are getting diagnosed by AI today. We find it impressive that health care was the initial area to release autonomous AI when we listen to a lot concerning self-driving cars and trucks.
What’s amazing in AI/deep learning right now?
For AI to transform medical care, specialists need to be central to the procedure. It cannot be changed by people beyond the profession, and it is far more powerful to have a healthcare specialist who has some knowledge of both worlds, than it is to have a world-leading ophthalmologist with no expertise of AI or a world-leading AI professional without knowledge of ophthalmology.
On the data science side, one very exciting area is generative models, such as generative adversarial networks as well as variational auto-encoders, which are approaches that permit one to produce artificial data, in addition to discover the latent features of a representation. On the engineering side, developments in AI DevOps platforms and also methods bring us closer to viable truly-continuous systems.
The most amazing advancement in AI/deep learning is the evolution of quantum physics published by Arute and associates from Google AI. The processor that has been called one that can dramatically boost the processing rate for data analysis. It takes about 200 seconds (3.5 minutes) to sample one instance of a quantum circuit a million times– to put this in context, the very same job done by a supercomputer currently takes approximately 10,000 years. This technology may well take us to industry 5.0 within the next couple of decades as it may, once more, interrupt several technical and also medical industries.

Does the execution of AI/deep learning into ophthalmic practice have a competitive element to it?
There definitely is an affordability aspect! Country-wise, several of the top challengers in the field of AI as a whole are the US, China as well as Russia, while the fastest-growing in regards to ability is in Africa and also Nigeria, specifically. In terms of funding as well as state-level enthusiasm, China is far in advance of every other country. The United States is a distant 2nd in financing of AI. Anecdotally, it appears that 8 of every 10 venture firms wanting to invest in AI are based in China. It will be interesting to see how it all plays out.
US/Canada and Europe have always been performing at the forefront of lots of countries worldwide due to the closeness to all the world class computer technology institutions (like Cambridge, Imperial, University of Toronto, New York City College and the California Institute of Modern Technology). Singapore is additionally fortunate to have a world-class technological team to create many durable algorithms in ophthalmology. Singapore just has a populace of 5 million. It is much smaller sized than other countries, but likewise, thanks to this, it is simpler to develop a robust ecosystem to support the scientific release of an AI formula – as an example, the abovementioned assimilation of the AI system right into the Singapore nationwide DR testing program. However, China will still get on first for numerous factors. Initially, China is the country with the largest population worldwide, and also in terms of data, they will certainly always defeat other countries. Second, individuals will after that doubt the cleanliness of their data.
The leading 5 eye organizations in China are already competing at the world-class level, including AI, and many of the Chinese medical professionals are, under-rated. It is surprising to find what they had actually currently accomplished in AI and data science in ophthalmology. Third, the Chinese government, led by President Xi, is incredibly supportive of making China an AI-integrated culture. There are lots of funding opportunities available for R & D associated tasks. At present, there are already many ongoing real time AI-integrated algorithms released in the clinical domain. That being stated, while China might still be a little ahead of the game, the language obstacle may impede some excellent clinical findings from being accepted in the high-impact medical journals worldwide.
What’s next for AI and deep learning in eye care?
The largest trouble for bringing new self-governing AI to market now is agreeing on what the disease really is. For DR or AMD, we have had outcome-based standards for decades: surrogates for outcome. It is easier to rigorously verify a self-governing AI to market when we have such an end result or surrogate outcome that is commonly accepted and also evidence based. In glaucoma, we are slowly evolving an appropriate surrogate result, as well as when that is done, we can rigorously validate independent AI for glaucoma, and also likewise for various other conditions.
10 years from now, a patient will certainly be available in, as well as we will have 10 various kinds of high-resolution imaging of the eye, like adaptive optics or OCT, a lot of different useful examinations, such as visual field screening, electrophysiological examinations, Electroretinography (ERGs), as well as complete genomic screening. Possibly we have the patient’s metabolomics as well as their proteomics from an urine sample, as well as they have actually published the contents of their phone or smartwatch, so it informs us concerning their daily tasks and also real-world visual functions. We will certainly after that need AI systems to aid us incorporate all this complicated multi-modal information, so we can make the best decisions for our patients.
Incremental steps are how we will certainly progress. The value of implementation and design will significantly be valued. Furthermore, healthcare financing models will establish as well as mature on a case-by-case basis to slowly inch us forward towards increased medical care access.


Panoptix  trifocal lens
FDA gave approval in the last week of August 2019 to Alcon’s Panoptix trifocal technology. We are excited to welcome another option to the family of PIE (presbyopia Implant in eye). We will explore the nuances of this lens, the lens material, the unique optical design and finally patient satisfaction in clinical and international trials.
Trifocal IOL

Multifocal lenses are defined as having more than one focus. They can have two in the traditional multifocal like tecnis and restor. Trifocals have three foci. Finally quadrifocal have four foci. Panoptix is actually a quadrifocal lens which has been modified to behave like a trifocal to improve distance vision.
If you are interested in physics and optics you can read on otherwise skip this paragraph. In a trifocal there are three points of foci. The distance is set at infinity. The intermediate add should be twice the focal length of the near. If near is at 40 cm than intermediate focus will be at 80 cm. In a quadrifocal we have distance still set up at infinity. The second add is at 1.5 times the near add and the third add is at 3 times the near. So if 1st add is 40 cm 2nd will be 60 and third at 120 cm.
Quadrifocal IOL

In Panoptix a special enlighten proprietary technology shifts this extended intermediary focus towards infinity or distance. This improves the distance vision.
ENLIGHTEN ™ Optical Technology

Panoptix lens is built on the acrysof platform of Alcon. More than a million acrysof lens have been implanted. This timetested platform produces glistening’s. These glistening’s can affect vision in some patients.

Hydrus Microstent for Early Glaucoma

Hydrus ® Microstent is a new type of MIGS

What is it? The Hydrus ® Microstent

It is a device which is implantable, flexible, a metal nitinol (Nickel Titanium) tube with windows (open-back stent) pre-loaded onto a hand-held delivery system which is used to implant the stent. The Hydrus ® Microstent is meant to decrease eye pressure (intraocular pressure, or IOP) in grown-up individuals with moderate to modest primary open angle glaucoma (POAG) by functioning as a support structure in one part of the natural drainage path of the eye (Schlemm’s canal). POAG is a kind of glaucoma where there is associated eye disease causing increased eye pressure and also where the eye pressure normally increases gradually. This progressive increase in eye pressure can be related to damages to the optic nerve which will impair vision significantly.

How does it work?

The Hydrus ® Microstent is implanted right into the eye of glaucoma patients to help fluid in the front part of the eye anterior chamber, or AC flow much more easily through Schlemm’s canal.


When is it used?

The Hydrus ® Microstent is intended to be used during cataract surgery. This is important for the reduction of intraocular pressure (IOP) in adult patients with mild to moderate POAG.

What will it accomplish?

In a medical research of 369 individuals, 77.2% who obtained the Hydrus ® Microstent attained a 20% or higher reduction in their IOP (intraocular pressure) compared to 57.8% (108/187) of the individuals having cataract surgery alone.

When should it not be used?

The Hydrus ® Microstent should not be used in patients who have any of the following problems:

  • When the colored part of the eye (iris) is pushed up against the drainage pathway (Schlemm’s canal) or when various other material obstructs the drainage pathway (Angle closure glaucoma);
  • Traumatic glaucoma, malignant glaucoma, or inflammation of the eye tissues (uvea);
  • Glaucoma related to the growth of abnormal blood vessels in the eye (neo-vascular); or
  • Visible birth abnormalities of the anterior chamber (AC) angle.

Treatment options of Astigmatism

Astigmatism – Everything you wanted to know about it

What does Lasik mean?

LASIK Meaning

LASIK, which is acronym that stands for laser in-situ keratomileusis, is a popular surgery used to correct vision in people who are nearsighted, farsighted, or have astigmatism. LASIK or Lasik, commonly referred to as laser eye surgery or laser vision correction, is a type of refractive surgery for the correction of myopia (nearsightedness), hyperopia (farsightedness), and astigmatism (blurred vision).

LASIK principle

LASIK works on the principle that by reshaping the cornea, the clear front part of the eye, light traveling through the cornea is properly focused onto the retina, which is located in the back of the eye.

LASIK Surgery meaning

During LASIK eye surgery, the instrument used is called a microkeratome or femtosecond laser which creates a thin flap in the cornea. The corneal flap is then painlessly peeled back and the underlying corneal tissue which emerges is reshaped using another laser. The LASIK procedure may be done on one or both eyes during the same session, one after the other. The excimer laser is used to reshape the corneal tissue underneath the peeled back corneal flap. A liitle part of the flap (the part which has not been peeled back) acts as a hinge and connection preventing it from being completely separated from the cornea. Glasses or contact lenses are designed to compensate for the eye's imperfections. Surgical procedures aimed at improving the focusing power of the eye is called LASIK surgery which may remove or minimize the uses of glasses (spectacles) or contact lenses. 9

LASIK Eye Surgery candidate

Criteria for a Good LASIK Candidate. 1. Your Eyes Must Be Healthy. 2. Your Cornea Must Have Sufficient Thickness. 3. Your Pupils Must Not Be Overly Large. 4. Your Prescription Must Be Within Certain Limits. 5. You Must Be Over A Certain Age. 6. You Must Have Stable Vision For At Least A Year. 7. You Must Be In Good Health. 8. If You Are Pregnant, You Should Delay Surgery 9. You should have realistic expectations

LASIK Eye surgery age

Age: Most providers won't perform LASIK on those under 18 because eyes tend to keep changing into early adulthood. However, laser eye surgery has been performed on children for correction of severe vision problems. These are outliers to most cases. Usually LASIK candidates fall between the ages of 20 and 40. In 2006, the

LASIK Surgery risks

British National Health Service's National Institute for Health and Clinical Excellence (NICE) considered evidence of the effectiveness and the potential risks of the laser surgery stating "current evidence suggests that photorefractive (laser) surgery for the correction of refractive errors is safe and efficacious for use in appropriately selected patients.” Clinicians undertaking LASIK surgery should ensure that patients understand both the benefits as well as the pitfalls and potential risks of the procedure. Risks include below expected improvement in unaided vision, development of some new visual disturbances, chances of corneal infection and complications associated with the flap. These risks should be weighed against those of wearing spectacles or contact lenses." The FDA reports “the safety and effectiveness of refractive procedures has not been determined in patients with some diseases. LASIK is a technically complex procedure requiring precision surgery. Problems, though not common, may also occur when the doctor peels back the corneal layer to create the flap, which can permanently affect vision. That is why it is important to choose a surgeon who is very experienced at performing these surgeries. LASIK may also, rarely, cause a loss of "best" vision. By best vision, we mean the highest degree of vision that you achieved with the help of contacts or eyeglasses. Some patients may also experience a kind of temporary discomfort in the first 1-2 days after LASIK eye surgery and may disappear after that. Other side effects, although rare, may include: • Glare • seeing halos around images • Difficulty driving at night • Fluctuating vision • Dry eyes

LASIK Surgery cost in USA

The actual price you pay for LASIK surgery, however, depends on many factors, and therefore the average price is only an indicator. The factors affecting the price may include the experience and reputation of the surgeon performing the surgery and also the type of technology or laser used for your procedure. Also the same surgeon may have variable pricing depending on the specific technology used. For example, a surgeon may charge more for all-laser LASIK or custom LASIK that is based upon wave-front technology. This technology for example provides the most precise vision correction possible, currently.

the average price for LASIK in 2017 was $2,088 per eye.


Smile laser vision correction


The Warm Caring Staff Of Khanna Vision Institute

At Khanna Vision Institute our happy, welcoming, and helpful staff strive to give our patients the best experience possible. 

Superior Technology

iDesign Wavescan is the Latest In Lasik Technology. It has over 1200 micro scans that scan the eye creating a custom treatment exclusively for you. Even corrects astigmatism! iDesign Lasik is the superior of all the previous scans for more information on idesign lasik visit:

Ten Best surgeon lasik eye surgery


Dr. Khanna has been in the practice for over 25 years. He has completed procedures for many celebrities as well as for the average Joe. Doctor Khanna takes pride in his skills as a talented eye surgeon and is always striving to perform at his best. He has been recognized as one of the top 10 best eye surgeons in 2017 and continues to strive for greatness. 

DALK Cornea lasik eye surgeon


Dr. Khanna takes safety very seriously. To him your safety and vision means more than money. His personal goal is to help you achieve maximum eye health and maximum vision capabilities. He does this through his 25+ years of experience and, considering safety is a major factor for him, he creates an eye plan specifically for you. 

Ten Best surgeon lasik eye surgery

Precautions after Lasik Eye Surgery


Good Morning, Dr Khanna here, with some very interesting questions on Lasik eye surgery, looking at it from a different angle. Some things I hadn’t thought people think and that’s how we learn more.

The first question is, “where to buy Lasik goggles” initially I got confused, like what do they mean by Lasik goggles? Then I understood. When we do Lasik surgery, we provide you postoperative kits, special glasses to wear, both during night, which are clear and wrapped around your face, so that you don’t accidentally touch or rub your eyes, and then during day time, so that no dust, sun or wind goes in and irritates your eye. I understand that some people are not able to get the same from their own Lasik providers and they’re looking to get good quality ones. So if you do online search, you can find like MHI Care, (INAUDIBLE – 1:08), solar glasses,, funny name but it’s true, it is very cheap. But these have some good quality, both sun glasses, driving glasses, antiglare glasses which are very affordable.

Can Lasik cause flutters?” No, Lasik does not cause flutters and Lasik does not treat flutters.

Which leads us to the next question, “can Lasik cause dry eyes?” Yes, Lasik can cause dry eyes, but usually it’s not permanent. When we did some studies, going back 20years ago, we used an instrument called the Osteometer, which checks the corneal sensation. We found that most of the corneal sensation returned back to normal between 3-6 months, and by 6 months people will adapt. That’s why when we are preempting dry eyes, that means we don’t want people to get dry eyes from Lasik, we start artificial tears, even insert punctual occluders in the corners of the lids to preserve the natural tears to prevent dryness from occurring. It is also very important to make sure that people don’t have severe dry eyes and that would become a contraindication. Like people with (INAUDIBLE – 2:27) syndrome who cannot produce any tears at all.

Another way we help people pre-avoid dry eyes, is that cyclosporine drops like Restasis or Zydra in indicated (INAUDIBLE – 2:41)

Our next question is, “can Lasik cure blindness?” I think that is a very general question. If the blindness legally is resulting from nearsightedness or astigmatism, yes, it can cure that. But if the blindness is from retinal detachment, (INAUDIBLE – 3:02) generation, optic nerve atrophy, then Lasik cannot help.

Can Lasik correct double vision?” This is very important, because just yesterday, we got referred to a 24 year old young man but his neurologist, to find out the cause of his double vision. Now double vision is known as diplopia. We had to separate diplopia from monocular diplopia, where in each eye, when the other eye is closed you see double, to binocular diplopia you see double only when both eyes are open. When it is binocular diplopia, then more nerve related issues or muscle related issues are the cause. Because both eyes have to work in sync, so if the muscle is weak on one eye, one eye will move and the other eye will not and then you can have double vision. But this boy has a very clear history, that even when the left eye was closed, the right eye saw double. And the other way, when his right eye was closed, his left eye could see double too. Such things point more towards astigmatism, and that was my first impression, and we checked it his numbers, found astigmatism, put it in the trial frame and he said yes the diplopia disappeared. So that will be cured by Lasik.

Can Lasik be done twice?” Yes, Lasik can be done twice. And when we do it the second time, we don’t even have to lift the flap. If we do Lasik today, and patient need to be enhanced to fine-tune in six months, we can just lift the old flap. But if the flap was done 10 – 15 years ago, with older instruments, it might not be wise to lift it up, and then the option becomes doing a surface treatment.

Thank you so much, keep your questions coming and watch out for answers.

What can I expect after having Lasik Eye Surgery?

So, you have gone ahead and had Lasik Eye Surgery. You may be wondering what to expect next. Are there any side effects or precautions you need to look out for or be careful of? We are here to answer all of your questions.

Side effects of Lasik Eye Surgery

After having Lasik Eye Surgery it is common to have some temporary side effects. One side effect is that you might experience some tearing from either one or both of your eyes, and it might switch between the eyes. Your eyes may feel irritated and/or you might feel like there is something in your eye. There might be the occasional appearance of small red spots on the whites of your eyes. You also may experience sensitivity to light and your vision may be a bit hazy on the day of your treatment. These are all common side effects and should not alarm you. If you are experiencing any other side effect or are concerned about any part of your recovery contact your surgeon immediately.


What Precautions should I take after having Lasik Eye Surgery?

Now that your Lasik Eye Surgery is over, there are some precautions we would like to go over with you. As with any surgery, or procedure, there are some steps you need to take to avoid injury or infection. First up, you are going to want to avoid showering or washing your hair until at least the next day. If you do decide to shower the next day you must be careful not to get any water, shampoo, or soap in your eyes for at least a week after surgery. Not that you would normally want any products in your eyes anyway! This just means you have to be extra careful. You will also want to avoid going swimming or using a sauna for at least three weeks after surgery. If you are thinking about getting your hair colored or permed, you must wait at least 10 days after your surgery. You should also avoid wearing any eye makeup for at least a week, and make sure it is clean so you can avoid any bacterial contamination or infection. You have to try not to rub your eyes for at least a month and you must sleep with your eye goggles for at least a week. You can exercise again two days after surgery but make sure to wear eye protection for up to a month after your Lasik Eye Surgery. Keep away from dirty or dusty surroundings for at least a week, and lastly make sure to wear sunglasses when you are outside in the bright sun.


By following these precautions, you will help to ensure a fast and safe recovery from your Lasik Eye Surgery.

If you have any questions or would like to set up a consultation call today 310 482 1240



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