I don't know about other eyeglass users but my angle of sharp vision is
a very narrow tunnel. Since my eyes automatically point at what I'm
interested in, everything "appears" sharp. I don't think the demands on
eyeglasses are anywhere near as tough as for a photographic lens. When I
look out through the extreme edges of my eyeglasses the image isn't as
sharp but I suspect that is due more to a curved image plane and old
eyes that don't focus very far rather than the effects of dispersion.
The high index glass lenses are thinner and lighter than normal glass
lenses but take much longer to get. Seems like everyone is using plastic
lenses. The high index plastic lenses are half as thick as conventional
plastic lenses and probably even more common. They've more or less
become the conventional plastic lenses.
-jeff
----- Original Message -----
From: "Tom Scales" <tscales@xxxxxxxxxxxxxx>
To: <olympus@xxxxxxxxxxxxxxx>
Sent: Wednesday, July 16, 2003 11:32 AM
Subject: Re: [OM] Plastic Lens question
> Mark,
>
> OK, I'm still lost. I have VERY bad vision. -12 correction with
serious
> astigmatism. I've worn plastic lenses for years, since the glass
version
> would guillotine my nose off. I buy the thinnest and lightest
available
> every time. I don't feel like I have any of the symptoms you
describe. My
> blacks are black without ghosting and my vision, corrected, is 20/18
or so.
>
> Tom
>
> >
> > This is easy the check if you yourself have good color vision, go to
the
> > store and look at one of the blanks. View some black text or lines
on
> white
> > paper through them. You will see a visible reddish-orange ghost
hugging
> the
> > top of the black text or lines and you will see a blushish ghost
hugging
> the
> > bottom edge (possibly I have my colors inverted).
>
> > Mark
>
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