LASIK Los Angeles, Cataract, Presbyopic Implants, ICL, Pterygium Specialist
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With reference to Presbyopia Correcting Implants, it is an accepted fact amongst ophthalmologists that  extended depth of focus lenses have actually increased interest in presbyopia-correcting lenses for surgeons as well as patients. As this topic relates, these implants provide an extended focal range rather than 2 unique focal points as in a multifocal lens. Although optically the Tecnis Symfony uses a unique system, functionally the Tecnis Symfony works likewise to a low add multifocal in offering patients distance as well as intermediate vision.

However like any type of lens that prolongs beyond a single focal point, the EDOF Symfony does have its constraints. Despite an ideal emmetropic result, a couple of patients complained about “spiderweb” glare, specifically while driving at night. These complaints become much more common when there is residual refractive error. These implants are certainly much more flexible of residual refractive error than conventional high add multi-focals, however, Doctors have actually learned to avoid doing mini-monovision with them due to these undesirable visual phenomena.

Around 60% of cataract patients choose presbyopia-correcting lenses, and here’s an approach the eye surgeons actually found to be extremely rational based on data from several research studies they have actually performed on patient satisfaction.

Initially, we’ll just talk about patients who are good prospects for a multifocal or EDOF lens. They have healthy and balanced maculas, controllable completely dry eye as well as fairly aberration-free corneas.

If a patient has astigmatism more than 0.5 D and also desires distance and intermediate vision, the Symfony toric is a an option.

For patients who prefer distance, intermediate as well as near, I do not recommend targeting a mini-mono-vision with an EDOF Symfony lens. A lot of these patients do not tolerate the spider-webs in the non-dominant, near eye. With low astigmatism, it likewise makes sense to do this with a Tecnis multifocal 2.5/3.25 also.

Now lets look at Restor active focus. It is yellow in color. It also provides ability to correct astigmatism.Again we do not recommend monovision with these. We have tried mini monovision in patients who were aleready employing that strategy with contact lenses. Those pateints did well. A better option, these patients will certainly do well with a ReSTOR ActiveFocus 2.5 in the leading as well as a +3.0 ReSTOR in the non-dominant eye. Therefore, we can achieve goal of reducing spectacle dependence for activities like Driving and Dashboard viewing, Playing or watching live sports & attending theatre or performance events. While Tecnis SYMFONY IOL lessens the effects of presbyopia and enable the patients to see clearly.


  SYMFONY   Tecnis Symfony is an extended depth of field lens. It works  a low add multifocal in offering patients distance as well as intermediate vision.   Patient’s complaints about “spiderweb” around lights, specifically while driving at night.         Tecnis Symfony is certainly much more flexible of residual refractive error than conventional high add multifocals for patients who prefer distance and also intermediate (but not near) vision and if they have low astigmatism.   Appropriate for patients who prefer distance, intermediate as well as some near vision.   It has high refractive accuracy but can rotate.   ReSTOR ActiveFocus 2.5   While ReStOR works on those patients who have astigmatism more than 0.5 D     With ReSTOR, patients have complaints of glare and also halos. They do not face “spiderweb” glare problems. They do well with a ReSTOR ActiveFocus 2.5 in the leading as well as a +3.0 ReSTOR in the non-dominant eye.   ReSTOR one may have desire more opportunity for a range of vision versus monofocal.         For patients who are not willing to compromise distance vision for a full range, ReSTOR is an appropriate answer. ResTOR is having more rotational stability for both eyes, again targeting emmetropia. This is important with toric lenses        


In the present scenario, multifocal intraocular lenses (MF IOLs) are the most stable,reliable and dependable method for the surgical correction of presbyopia.  While looking at the facts, residual astigmatism is one of the leading causes of dissatisfaction after the implantation of a MF IOL.  

These IOLs require emmetropia for the attainment of the best visual results, and small amounts of astigmatism that may limit visual performance significantly.  Thus, astigmatism has to be completely corrected in order to obtain the maximum efficiency of a MF IOL. Hence, we like to correct astigmatism by various methods. If it is astigmatism with spherical equivalent of zero, we perform limbal relaxing incisions at the time of cataract surgery or during follow-up period. When there is associated myopia or hyperopia we deploy advanced wavefront idesign laser vision correction achieve emmetropia.

About the Author Rajesh Khanna, MD

Los Angeles Lasik Surgeon Rajesh Khanna MD is a recognized pioneer in Presbyopic Implants for correction of aging eyes. He has popularized Cornea Cross Linking and Intacs forKeratoconus. He is an Expert Cataract, Pterygium Eye Surgeon, A Cornea Specialist he performs Laser Corneal Transplants, DMEK, DSEK and DALK. Rajesh Khanna MD is a well known medical writer. He has published the bestseller "The miracle of Pi in Eye".He is also a columnist for the newspaper Acorn. Dr.Khanna also hosts "Medical Magic". In his spare time he hikes with his family and German Shepard or does yoga. He also plays field hockey and loves swimming.

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