Message from discussion Stay away from "vision educators"

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From: Mike Tyner <lite...@googlemail.com>
Newsgroups: sci.med.vision
Subject: Re: Stay away from "vision educators"
Date: Sun, 30 Mar 2008 05:27:15 -0700 (PDT)
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So you blame glasses for lattice degeneration? That's new.

-MT

On 30 Mar, 13:26, Kevin <lite...@googlemail.com> wrote:
> In article <2zEYa.1631$vo2....@newsread1.news.atl.earthlink.net>,
> mty...@mindspring.com says...
>
> > Bates: "ALL glasses contract the field of vision to a greater or less degree."
> > Patently false. Minus spectacle lenses can increase the field of vision. They
> > don't always, but they certainly can be made to. Minus lenses minify, and more
> > objects are "drawn into" the field.
>
> The area of useful sight for a person wearing glasses is reduced by
> the simple fact that glasses do not extend to the edges of the visual
> field. To say that more objects are drawn into the field skips the
> point.
>
> There are areas of visual information at the outer edges of the sight
> which become discarded by the person wearing glasses. Frames
> themeselves block light rays, and all rays beyond the edges of the
> frames are no longer perceived as useful. The retina thus becomes
> accustomed to working effectively over a contracted area. To say Minus
> lenses minify is quite correct, - they draw more information into an
> area of sight that has been contracted.
>
> It is well known that in general all myopes have a deterioration at
> the very edges of the retina as compared to people who have not worn
> glasses.
>
> An optometrist assumes that the deterioration is a result of being
> myopic. I would suggest that the fact that the person is trained into
> using a smaller area of the retina should not be ignored.
>
> Kevin