Posted , 9 users are following.
Alot of people like myself with cataract surgery upcoming spend alot of time worrying about whats the right choice of IOL. But is it true no matter what IOL we choose as long as we have a good surgeon who does a good job we will have good vision , with or without glasses . Every IOL's on the market must provide good vision otherwise they would not be on the market
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RonAKA john20510
Edited
It might help with your decision process if you step back and look at what these lenses are doing with respect to image quality. A few years ago IOL's were made with spherical profiles. While they were easier to manufacture they did not provide as sharp a focus as is possible. The improvement on this was to make aspherical lenses where all of the light comes to a pinpoint sharp focus. This provided the sharpest possible image. However because all the light is coming to the same point, it actually reduced the depth of focus where the light is spread over small distance. Depth of focus is what lets you see closer. Google this article for a simple diagram of what this looks like.
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Winvisionblog Aspheric IOLs november 30, 2016
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What the spherical lens is doing is not unlike what EDOF lenses are doing. They spread out the point of focus to get incrementally closer vision, but the price is the sharpness of the image. And the sharpness of the image in turn impacts the contrast sensitivity. It is a tradeoff with image sharpness and contrast sensitivity are what is being sacrificed for extended depth of focus.
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Based on the reading I have done here is how common choices in EDOF lenses stack up based on how good the image quality is and how much EDOF they provide:
Lens - EDOF
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This is why I have suggested getting an aspheric monofocal lens in your dominant eye. It will give you the sharpest possible image and highest contrast sensitivity at distance. And, if it gives you the close vision you want then you are gold. Just get another one in the second eye. And, if it comes up short for car dash vision then you can select one of the other choices to get closer vision while sacrificing some image quality in the nearer vision eye. At distance your dominant eye will still give you the sharp vision.
daniel46601 john20510
Edited
I had Eyhance done on Monday and Tuesday. My preferences were similar to yours..... read with help from reading glasses. My left eye a few days following surgery is 20/30 and right is 20/20. Driving is excellent. The dash is clear. My laptop is still lacking in sharpness. It is readable but not something you want to spend alot of time with.
So, I'm using cheapo 1.25 reading glasses which makes the laptop sharp and this phone where I'm typing this in. Of course I'll need to let things settle in before seeing what vision help I'll want or need. I did not discuss any of the lens tweaking strategies I've seen discussed here. My doc did 30 surgeries on my surgery day and has 2 surgery days per week. That's alot of cataract and lasik surgeries so I pretty much entrusted him. Satisfied so far. I do have these readers hanging around my neck at all times so it is a bit of a lifestyle change. But I HATE glasses so this was the best option. I was not a candidate for the multifocals. BTW I appreciate very much this discussion board. I spent alot of time reading before my surgeries. And I appreciated having these done on successive days.
john20510 daniel46601
Posted
Dont worry if your vision is not as good as expected it will take weeks for your eyes to heal and maybe months for your brain to adjust to the new lens. Did you Get Eyahnce set for distance or plano in both eyes ? did you consider vivity an EDOF, what made you decide agaisnt it.? l told my surgeon l want Eyhance but he keeps telling me Vivity is better. All l really want is to have perfect vivision for driving , TV and outdoors and just enough to read stuff at arms lenght
daniel46601 john20510
Edited
Things moved quite quickly for me. I met with the surgeon and staff and Wednesday and surgery was scheduled the following Monday and Tuesday. I couldn't do it the next week or the week after that due to conflicts. He only does surgery on Monday and Tuesday. So i didn't get an opportunity to explore all this. The doc was made aware of my priorities..... see distance and see laptop and computer screen without glasses. I was not a candidate for multifocals. It appears that the Eyhance is a solid choice though the Vivity has a good reputation also. In any case his reputation appears quite good and he's done so many of these for so long that I felt comfortable with him taking the wheel on this. We didn't discuss the things that you mentioned.