Contacts for astigmatism

For astigmatism, especially if using RGP type lenses, it seems like you
could build the backside of the lens to fairly precisely match the
shape of the cornea. With it like this, the lens would suck in to the
cornea in a known orientation, so rotation would not be an issue
(assuming enough corneal astigmatism, and thin enough tear layer).
With that, the outer surface of the lens could be built to provide the
desired correction.

Why is this a bad idea? I assume someone has thought of it. Is it
just too hard to manufacture super custom lenses like that?

--

Charles wrote:
> For astigmatism, especially if using RGP type lenses, it
> seems like you could build the backside of the lens to
> fairly precisely match the shape of the cornea. With it
> like this, the lens would suck in to the cornea in a
> known orientation, so rotation would not be an issue
> (assuming enough corneal astigmatism, and thin enough
> tear layer). With that, the outer surface of the lens
> could be built to provide the desired correction.
>
> Why is this a bad idea? I assume someone has thought of
> it. Is it just too hard to manufacture super custom
> lenses like that?

My doc offers these or something similar. I will have to
check to see what it's called. They use the raw data from
a corneal topographer to manufacture the lenses.

hmmm, just checked his website. It's not on there any more.
Wonder if the company didn't make it or something? I'll
ask next time I go in.

-Quick

Quick wrote:

>
> My doc offers these or something similar. I will have to
> check to see what it's called. They use the raw data from
> a corneal topographer to manufacture the lenses.
>
> hmmm, just checked his website. It's not on there any more.
> Wonder if the company didn't make it or something? I'll
> ask next time I go in.
>

Maybe they couldn't live up to their own hype. A common tale.

DrG