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  • Archive: May 7th, 2018

Archive Daily Archives: May 7, 2018


Idesign Lasik

What is iDesign Lasik?

Hi. This is Dr. Khanna, and today we are going to talk about iDesign LASIK eye surgery and why it’s one of the best LASIK vision corrections available today.

We have come a long way from the early ‘90s, when lasers were first invented to correct or reshape the human cornea. The precision and accuracy and safety has increased in the culmination of iDesign. It’s better than SMILE. It’s better than conventional, Wavefront Optimized, and even Wavefront LASIK, because it can not only correct astigmatism and other aberrations, it can do it very precisely. Let me just focus then on a little iDesign picture to show you what all it measures, and then it can treat that. If you look at this picture, it identifies the outer iris boundary. It identifies the inner iris boundary.

Smile vs Idesign Lasik Surgery

Smile vs Idesign Lasik Surgery

It identifies the hills and valleys, and also, the center of the cornea, the fixation, reflects, and the pupil, center of the pupil. These become very important when you’re dealing with esotropia or exotropia or angle alpha and kappa. Without getting you confused, all the three things I mentioned, the center of the pupil, center of the cornea, and the side reflects should be well opposed or as close to each other. The fun begins when they are separated, and that’s where we get into angle alpha and kappa. It becomes very important that the computer which is generating the treatment profile takes those into consideration and the algorithm is based on previous studies and seen where the outcomes would be the best.

iDesign Lasik does that. We don’t have that facility in conventional and other forms. Now we’re going to turn to some more interesting pictures here. If you look on this, I’ll move onto this side. These are 3-D images of the higher order aberrations, all aberrations, and the refractive map, and the point spread function of the higher. If you want to focus on in here, you’ll see it looks fairly uniform, though even from here to here versus from here to here, you see the shape is different. If you’re using SMILE or conventional, they’ll not be able to match, correct the shape, because for -5, it’ll be just making it like a sphere. Whereas in iDesign Lasik, the treatment is matched to the exact shape.

This gets even more interesting when we look at the higher order aberrations. What are the higher order aberrations? They’re called coma, etc., trefoil patterns. The lower order is what we are used to. The sphere, cylinder. But in the higher order of aberrations, if you look, how do they generate this? If you want to do SMILE or conventional, how is going to be possible to match the shape to correct this? What it means is, here on the hill and here, it needs more spots and here it needs less spots. The same thing we can see in the point spread function, that the cornea is not uniform when you compare superiorly and inferiorly, and even temporally and nasally.

If you were to put a mirror here, this spot and this spot wouldn’t match. That means the treatment profile is unique for each eye, and that can only be achieved by a really fast computer processor and special cameras which can pick up and then transmit all that information to a laser which can use that by variable spot scanning to reshape the cornea to give us the most precise vision possible.

I hope this is helpful. If you have any questions, feel free to comment or reach us at 805-230-2126. Have a wonderful day.