Re: [ATM] Intentional astigmatism

["Bill Kelley" <flex@commspeed.net>]

Kevin,
Many years ago (early 90's) an optometerist in Salt Lake City and I worked 
to develop a simple glass spectacle lens with only the astigmatic 
correction, mounted in a rubber eyecup, and well marked for "up". We thought 
that lab workers using microscopes would also be a market. They worked fine 
and would be easy for you and your local optician to cobble up. We didn't 
follow up for some reason after having a few people try them and say they 
liked them.  Sic transit gloria mundi :^)
Bill Kelley

----- Original Message ----- 
From: "Kevin Whitefire" <chaosopher23@yahoo.com>
To: <atm@atmlist.net>
Sent: Thursday, April 07, 2005 2:42 PM
Subject: [ATM] Intentional astigmatism


> I'm wondering if it's possible to induce intentional
> astigmatism in the focal plane, very weak astigmatism,
> using a thin lens, that will compensate for my
> eyesight.  Is this possible?
>
> If it is, I see that it will have to be rotationally
> variable and removable from the optical path for other
> people and photography in order to work.
>
> My astigmatism is rather minor, but annoying when I
> look at either straight, parallel lines (sheet music)
> or points of light (stars).  My eyeglasses have a
> focal length of about 24 inches and vertical
> astigmatism that gives a solar focus of about 3" tall.
> I'm far sighted with 20/25 and 20/30 without glasses.
>
> Regards,
> Kevin of Eastern Iowa
> Seeker of the Darkness
>
>
>
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