reading glasses and computers

On May 20, 8:43*pm, Ian wrote:
On May 20, 10:54*am, "Mike Dworetsky"





wrote:
Ian wrote:
On May 20, 7:48 am, "Mike Dworetsky"
wrote:
Ian wrote:
I hate to say it, but my $5.00 pair of reading glasses from the
pharmacy -- which are great for reading books -- just don't focus at
my lap top screen which is about two and a half feet in front of me..

You probably hold books closer than 2.5 feet. Get a slightly weaker
pair just for computer screen use, so that the focus is at screen
distance (usually further away than a book).

My wife complained recently that her neck was aching. I watched her
using the computer, and it was obvious that she was tilting her head
back to use the varifocal reading segment. I told her to go to the
opticians to get a pair of reading glasses optimised for computer
work (they would know what to do in terms of diopter strength) and
presto, that worked perfectly and she is a happy bunny now.

The only downside is needing to carry two pairs of glasses instead
of one.

The diopter strength (as Steve Willner says) is the inverse focal
length in metres. So what you need is probably something like the
reading strength -
0.25.

You are lucky if both eyes have the same prescription, mine sure
don't.

--
Mike Dworetsky

(Remove pants sp*mbl*ck to reply)

Thanks, I will try that. It is good to know, I will get some drugstore
glasses as extra pairs, but I think I am read for a prescription set,
too, adjusted for the computer because the drugstore glasses have
plastic lenses, a little murky, I am ready to look through glass.

The optician can also check you for astigmatism, which can cause blurred
vision. *Even a little bit, that you might not notice every day because you
are used to it, can be corrected and you may be surprised how much things
improve.

Modern spectacles are made with special shatterproof plastic, not glass, for
safety reasons. *I don't find any problems with the quality of the lenses.

--
Mike Dworetsky

About two years ago I found I had to hold a book at near arms length
to read it, I usually hold it up about a foot to a foot and a half. So
I bought a pair of drugstore glasses and that worked great, but then
my computer screen was blurry with the glasses. I had learned several
years ago that as we grow older the muscles in the eyes relax, so the
eye lens relaxes, thus making us become far sighted. After trying a
pair of prescription glass, I thought they were clearer, less murky
than drugstore glasses. I decided to get an examination -- and I am
sure they will check for astigmatisms -- and now I know to get two
pairs of glasses. Those with diopter for computer distance and those
with diopter for book distance. The next phase we go through is one of
the eye lenses builds up a residue, becomes foggy and that is when we
have to get it replaced with an artificial one. Cataract surgery in
other words.

Sorry I posted that story twice, I thought it did not post the first
time.