Try the progressives. You can do so at not cost if yo don't like them.
Most every optical house offers a 30 to 60 day warranty on them and will
take them back at no cost to you.
I was not sure myself, but once I got progressive lenses, I was hooked.
Been wearing them for over a dozen years and I'd never go back to regular
That's what I did. Reading glasses tend to have a focal length of 12-14 inches -
the distance you hold a book from your eyes. If you have a big monitor, you can
easily double that focal length. I had my computer glasses done to a 30 inch
focal length. Eye doc's machine wouldn't go that far, but I insisted. They work
What you really need is a good optician. One that understands your needs and
can make the proper lenses. Since I'm not an optician, I'm not going to
give you exactly what you need, but it does exist. I've been wearing lasses
for 55 years or so and I'm very fussy about them.
Most likely, that bifocal lens should be made into a progressive lens. That
gives you different strengths at different angles so a minor tilt of the
heat gives you perfect vision for the distance at hand. You may want to
measure the normal distance from eye to monitor.
Progressive lenses can take a day or three to get used to, but once you do,
there is not going back. Consider a no glare coating also. Makes night
driving easier and makes using the computer easier when there is other light
More "X"s (diopters) = ability to get closer to what you want to see. Since
your monitor is further away than printed reading material for which you use
+2 diopters, you should have decreased the strength instead of increasing
What I do is use bifocals, bottoms for reading distance, tops
ground for screen distance. (Distance: over the top)
One trick I use:
For me, it's critical that my left and right eyes go into and out
of focus at EXACTLY the same distance.
Now, the optician and her machines/lenses "which is better -- this --
or that" procedure isn't precise enough to do that. Here's how
to get it not just right, but PERFECT:
After she's written down you prescription, ask her to put
the lenses that add up to that into those test (and heavy)
metal eyeglasses, AND to give you a couple of quarter
diopter and a half diopter "hold up in front" lenses,
and go out into the waiting room.
(Of course you've brought your measuring tape with you,
and already know the exact distance from your slouched-down in
your chair eye-distance to the screen.)
Then get a magazine with fine print, close one eye,
looking at the magazine via the other, and bring it
in until (with eye relaxed) it goes out of focus --
write down that distance, and extend away until it
again goes out of focus, and write that down.
Then do the same with the other eye.
Now, how do he two eyes compare? (that will tell you
how good her procedure was) Then start holding the
quarter diopter lens up close in front of your
test frame, etc, until you get what you want.
Oh, also ask her to give a "minus" (thicker at the
edge ie rim than at the center=thin) quarter dioopter,
to give you more freedom.
Anyway, when done, both eyes go into and out of focus
(relaxed eye!) at the same distance, OR one range
is totally WITHIN the other one.
That's about as good as you (or anyone else) is going
to get it. Adjust your prescription by adding on
the exter lenses diopters (that works for small
amount of diopters, because then the sine of
the angle (radians) is almost equal to the
angle itself. I think that's the assumption
behind much of this eye-optics stuff.)
One other scheme I've read about is exactly the
opposite. Have her prescribe for one eye
at screen distance, and the other at near
(or far?) distance, and presto, no bifocals
needed. Not for me!
I think I will get a pair of 1.5x and 1x. I will have to just try
them to see if it will let me see my monitor and keyboard (which is
about half the length to the monitor) I don't think I would ever get
trifocal. Maybe a set of bifocals for reading/computer. My long
vision is off slightly, but I don't really need glasses for far off.
On Fri, 15 Jul 2011 22:26:48 -0400, email@example.com wrote:
A much better solution is to make the icons and text larger. LCD displays
suck when not run at their native resolution. "Larger" characters on a higher
resolution display will be better formed and easier to read, too.
Pixelization (sp?). Unless you happen to get lucky with a multiple or
fractional resolution, something on screen will have a jagged edge, like
when you zoom the weather radar image on most weather pages too close.
But having said that- modern LCD displays have pixels a lot smaller than
the early ones. My father is damn near blind, and no way would
the1400x1050 native rez on his Samsung monitor would have worked for
him. I spent a couple hours fussing with various resolutions and windows
custom settings, and came up with settings that while not perfect, are
at least tolerable, and round stuff is pretty close to round. It's a
trial and error thing, very monitor and video chipset dependent.
I love flatscreens just for the desk space they free up, and will never
buy another glass monitor again. But at home, I'm still using a couple
19" Trinitrons- damn things just won't die, and they are sharper than
any LCD in my current budget range.
On 7/16/2011 9:49 PM, firstname.lastname@example.org wrote:
I bought these 2000-vintage Dell p991s for about $25 each maybe six
years ago. They do 1600x1200, but my eyes aren't that good any more. I
run them at 1152x864, with default XP font and icon sizes, and find them
Yeah, LCDs have gotten cheap, but I'm cheaper. Until these die, I can't
justify replacing them. And I haven't seen many LCD monitors make it to
the 5-year mark (Judging by the 1700 or so at work), much less 11 years.
Like I said, I'll never buy another glass monitor, but with these 2 19s,
and half a dozen 17s stacked up in the other room, they may outlast me.
(I can't even give the 17s away- Goodwill won't even take them. And I
refuse to trash working equipment. It Just Ain't Right.)
As I said, this one is four years old and I have another (a 21") that's six,
though it's not used much (I'd run a third monitor on this laptop but I
haven't figured out a way to do it, that works).
I've thrown away three 19s and have another that's only in my way. It'll go
as soon as I can figure out how to get rid of it.
On 7/16/2011 8:49 PM, email@example.com wrote:
I have a pair of Nokia 21" shielded CRT monitors with a .22 dot pitch
and it's like looking at a film projection. As you may know, a .22 dot
pitch on a large monitor like that is a bit unusual and high resolution.
I think the original price on the boat anchors was $1,100.00 each years
ago when they were new. I don't use them now due
to their unwieldy character and my big LCD monitors that don't require
a fork lift to place on a desk. ^_^
On Sun, 17 Jul 2011 03:02:13 -0500, The Daring Dufas
If I didn't screw up the arithmetic, something like 1900 x 1500. If the
geometry were perfect it would challenge a modern LCD. None were perfect.
That's one of the little appreciated advantages of LCDs. There is no
pin-cushion, trapezoid, rotation, or any other geometric distortions to deal
On 7/17/2011 12:05 PM, firstname.lastname@example.org wrote:
The first 17" monitor I bought back in the early 90's was $549.00
wholesale because I was a dealer. What a wonderful picture it had.
When I got the monster Nokia monitors years later, I was blown away
by the resolution even though they weighed a ton apiece. Now I have
all these big LCD monitors and think back about how complicated it
was to get a clear big image on CRT displays. Ah, progress and the
technology marches on. I can't wait for the direct implant for the
brain's visual cortex. ^_^
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