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Re: [OM] How does it look?

Subject: Re: [OM] How does it look?
From: Peter Klein <boulanger.croissant@xxxxxxxxx>
Date: Wed, 7 Feb 2024 13:43:07 -0800
You've gone into the technical depths of this much more than I have. For me, visual sharpness and color perception improved drastically after cataract surgery than before. The main visual issue is that I see crunchy halos around bright light sources at night. And I find bluish LED car headlights painful. I call them "death rays." I just got a pair of light yellow glasses that fit over my regular specs. They mitigate the death-ray effect without significantly diminishing my view of the road and idiot pedestrians that insist on wearing black at night.

I had other complications that I discussed here long ago. I had a detaching retina a year after the first surgery (fluid leaked under the retina from the pulling during surgery). And a macular pucker on the other eye a few months after the second. And I ended up seeing double at distances because the surgery and change of focal length aggravated underlying strabismus in both the vertical and horizontal planes. All this has been corrected now, but I need prisms in my glasses for all but close vision. I'm an outlier--most people do fine.


> Wayne writes:
> <<Mike, interesting observation on CA as I've just had cataract surgery on
> <<second eye this morning.  Do you have a good reference on the resultant
> <<visual effects of this surgery?
> I hope all went well. IOL exchanges are a pain.
>  The use of spherical aberration or other techniques to extend the depth of > field for IOL's (Intraocular lens) informs the IOL choice and not much to do
> after if the refractive targets were hit and you are happy.
>  On the other hand for someone with large pupils who drives at night frequently > cancelling out the corneal pos SA  with an aspheric monofocal IOL may have an > advantage to maximize contrast sensitivity at the cost of very narrow dof. > Rayone EMV IOL uses modest pos SA in the center with a rapid taper to slightly
> neg SA towards periphery to extend the dof about 1.5 diopters. Truly
> accommodating IOL's with no downside (except expense of course)  are in the > works but it will be a few years. Eyhance IOL uses a small amount of neg SA > but it buys only 0.4D or so on average of extended dof.  It does perform well > in patients with largish pupils as the MTF doesn't plummet as it cancels out
> the corneal pos SA. Clear vision, Mike

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