[TheForge] Progressive lenses

[Bob Ehrenberger]

I second what bruce said.  My first bi-focals were progressive, they drove
me nuts (know you know why).  I hated having to turn my head in order to see
something clearly.  Besides that I was never sure I was in the right spot so
I kept moving around to see if I could get a better image.

My current glasses have the little window in the bottom, I like that much
better.

For my next glasses I'm going to get the split screen with the whole bottom
third being my reading perscription.  Unless they cost too much, then I'll
get the windows again.

I have computer glasses, set for reading my monitor.   I would like to have
a pair that have a reading window in them.  It would make editing much
easier.  Even though I have been using computers for over 30 years I still
need paper, and tend to miss things on the screen, that I catch on hard
copy.

Robert Ehrenberger
Shelbyville, Mo.
eforge at centurytel.net

------Original message-----
From: "Bruce Freeman" <FREEMAB at pt.fdah.com>
Subject: [TheForge] Progressive lenses (was: bifocal safety glasses)
To: <theforge at mailman.qth.net>
Message-ID: <s3ba379a.075 at gv01a67m.gv.us.pri.wyeth.com>
Content-Type: text/plain; charset=US-ASCII

Progressives can be a problem.   Know what you're getting before you spend a
bundle on them.

The problem is that some genius decided we only use the center of our
glasses - not the edges, so progressives commonly have a useful area that's
more-or-less funnel-shaped - broad at the top, and narrowing as it goes down
to the "close vision" section.  The lens outside this area is useless.  That
is not true of all progressives, but you have to pay more for better ones.

This may not seem like a problem at first, but it turns out that peripheral
vision is also used by the brain for depth perception.  Anything that
restricts your perpheral vision screws up your depth perception.

Bruce
NJ