In article
<f84f7f34-b6d6-46f1-8f9e-(E-Mail Removed)>,
Liz <(E-Mail Removed)> wrote:
> > I wonder how a cataract surgery could be harder or easier? *My limited
> > understanding is that they remove your lens and put a new one in. *It
> > doesn't seem like how bad the original lens is would be a factor.
>
> Well, that's what I thought too, but I was wrong.
I was nervous enough before the surgeries, and wasn't told about any
complications, so I tried not to read about them. That just would have
made me more nervous, without good reason.
> Also, if the cataract is opaque to light, this makes it harder to take
> measurements of the inside of the eye. You need these measurements to
> accurately choose what power of plastic implant to put in.
That's not my understanding at all. It's difficult to measure anything
optically when you are looking through a lens and don't know its power.
The cataract changes its power, in unpredictable (in detail) ways.
These measurements are all done using sound waves, as far as I know.
> > I don't know if anyone will see this old thread, but if so, I'd be
> > interested to hear comments on the idea of putting astigmatism
> > correction (for corneal astig) into the replacement lens. *If there
> > might be one up side to this it could be that I could lose my glasses
> > for distance.
I don't know much about this, and didn't choose to do it, although I
have considerable astigmatism in one eye. For a normal cataract
surgery, the surgeon sticks the lens in at any old rotation. The lens
is rolled up in a tube, and unfolds inside the eye. To correct
astigmatism, the lens has to be at a particular rotation. This adds
complication to the procedure. In addition, nothing is holding the lens
in place at first except some very flimsy plastic "fingers". The lens
can, and does sometimes, rotate. This requires another surgery, since a
lens to correct astigmatism does a lot more harm than good if it is at
the wrong angle of rotation. There is also surgery to the cornea to
correct astigmatism. This can be done at the same time. I would think
it could also be done separately, but don't know.
> There are toric lenses that correct for astigmatism. I am told, but
> don't know if it's true, that they work best if you have a lot of
> astigmatism.
>
> Another lovely disadvantage to Crystalens (I'm sorry, but they make
> the product; I only report!) is that SFAIK, it does not block longer-
> range UV light as well as monofocal lenses do. Thus, you want end up
> wanting to wear UV-blocking glasses afterwards. Probably this too
> will change by the time you need them.
> Heaven knows.
>
> Liz in Indy (I think it's Indy)
--
Dan Abel
Petaluma, California USA
(E-Mail Removed)