Probably because there are too many distance glasses "variables".
Everyone reads at relatively the same distance. Magnify the letters in
specific increments (1, 1.25, 1.5, etc.) and you'll satisfy the vast
majority of readers. Reading glasses are just magnifiers. I can get by
using my computer for short periods with off-the-shelf reading glasses, but
I keep a pair of prescription glasses on my desk at work which were made
just for using the computer. They compensate for the exact problem with my
eyes as opposed to just magnifying the type. (I also have a special pair of
bifocals for using a computer at 5 feet while also taking notes/reading)
Distance problems can be at 5 feet, 10 feet, 25 feet, etc. and caused by
all sorts of different eyeball shapes and issues. You can't fix enough of
any one problem with off-the-shelf distance glasses to make it cost
Distance problems are only caused by one thing: the spherical shape of the
eyeball. If it is too protruding, one can see well close up but not at
distance; too flat a shape and the reverse is true. To correct either, all
that is needed is a lens that returns the eyeball to a spherical shape.
When we get older, most of us lose some of the ability of the eyes to adjust
their shape to focus at closer distances; ergo, reading glasses.
Eyes can have other problems such as astigmatism but the effect of that is
that objects in one plane are focused differentially from those at 90
This 'shape' of the eyeball explanation makes sense, since it is based
upon a camera system, something everyone can relate to. Until,...I found
out that people with multiple personality will test completely differently
based upon which personality they are. One, is so myopic as to need
'coke-bottle' glasses, almost legally blind, Another, has perfect 20/20
and so on. Kind of 'redefines' vision. Or, maybe they force change the
shape of their eye balls.
All you need is a negative meniscus lens of whatever power you need. A
negative meniscus lens is one that is thicker at the edges than in the
middle; "reading" lenses are positive meniscus lenses, thicker in the middle
than at the edges. The difference between the thick and thin part determines
the diopter (power).
Simple meniscus lenses in a huge variety of sizes and diopters are readily
available; Edmund Scientific being one source.
Go buy two and glue them into a frame. Or buy one and learn to use it as a
I don't buy my reading glasses at the drugstore. Too expensive. I
buy them at the dollar store.
And I did buy bi-focals once, since they were only a dollar. I didnt'
really like them. Had to lower my eyes too much to use the strong
part. Felt weird or even painful. There might have been more than
one pair for sale, but I havent' seen them except that one time, maybe
4 years ago. If you mean with a hidden border between the different
sections, or some sort of continuous change from weak to strong, I
thin it's because no one makes them, because there isn't enough market
for expensive cheap lenses. Even at the supermarket or drugstore,
that's what they'd be.
Of course at the dollar store they're pretty cheaply made, and except
for the style I bought a long time ago, all the plastic frames are
pretty much guaranteed to break after a few months, I think because
they are meant for women and my head is wider than a woman's.
I don't like the metal frames because those plastic feet that rest on
the nose catch on my hair when I lift the glasses, unless I just had a
haircut. But they don't break anywhere near as much, unless I sit
on them, and the arms can be bent to make them tighter when the hinges
Please visit this web site. I've got no interest,
other than being a satisfied customer. Last time
I checked, they had eye glasses starting about
eight bucks a pair (which includes single focus
lenses to your Rx). More for bifocals, tint, and
some other options.
You need to know your Rx, and your PD (pupilary
distance). Last time, shipping was $15 or so, for
any order size.
Glasses made in Hong Kong, and shipped to you from
some where in California.
I bought several pair of reading glasses, distance
glasses. Put spare eye glasses in the vehicle, and
set of reading glasses in my church book bag.
I've been getting my glasses online from Zenni optical made in China.
Last pair with bifocal, memory titanium frames, anti reflective coating
and shipping was $55. Same thing from local optician would be over $350.
Wife criticizes me for not spending locally but I tell her that I use
the savings to buy local beer. Besides, looking at the local opticians
glass case, it says, "Made in China."
What you want is a progressive bifocal lens. Besides prescription, all
you need is to measure your pupillary distance.
My eye doctor did mine but you can do it yourself.
interesting. have you tried exercising your eyes?
My father-in-law used to wear 'coke bottle' glasses. then went on a trip
of eye exercising. Focusing close/far, close/far for ten minutes a day for
a year. He said he had terrible head-aches, but finally he never wore
The Chinese govt,with their socialistic health service started getting hit
with requirements for prescription glasses - due to the computer
revolution for them. Simple math tells you that's a BIG hit in cost!
almost at any percentage. So they went into providing eye exercises for
people and voila! fewer glasses were required.
for me, when things get a bit blurry, it's into eye exercises and
blurriness goes away.
Conclusion is to try it.
focus far, focus close, one eye at a time, you'd be surprised how much
that strengthens your eyes.
For close work, I still need the 1.50 eyeglasses from the drugstore, but
at least they've held for over 20 years now. Whereas my brother has gone
through tri-focal glasses now.
How old was he when he did that? How old is he now?
That's a reason not to do that. Don't want to end up like the Red
In my case, I first needed glasses, 1.25, when I was 50 and the type
was small and the light was bad. Now I need 1.25 when the type is not
quite as small and the light is pretty good (but not if the sun is
shining right in the window on what I'm reading.) and I'm 66.
If it gets worse maybe I'll try your exercises.
[my understanding] in his 20's, deceased - died on a guerney in a hospital
during a normal examination. Must have been too far away from medical
LOL! yeah, we don't want to end up like them, "soon to be rulers of the
Especially, after listening to an interview with a young couple struggling
to survive. They had just wrecked their truck which they used as part of
their floral business. They were barely making ends meet and now this
completely unexpected hardship. They said their insurance didn't cover
completely and rates would definitely go up, didn't know where theyd get
the money to replace the truck and may lose their business. More
importantly, they were extremely worried about where they would get the
money to keep their children in school! Thought I was listening to a U.S.
midwest couple's lament, only to find out I had been listening to the woes
of a young couple in China?!!! I thought, wow they ARE just like everyone
else, and then wondered if the interview was some type of 'propaganda' to
convince me they were like eveyrone else. Well if it was, it worked, I
still hear the laments of the young couple's woes and firmly believe it to
be true. On the flip side, I no longer trust ANY non-persoanl situation
that leaves such crystal clear memories. Even some personal situations
have become suspect. And, discount all such as attempts to manipulate my
That's right. Wait until it's too late. :)
My experience similar. I just use the eye exercises now to be able to keep
using the 1.25's Have to admit that having poor vision is a bummer! Like
being in a prison. Now I have relative whose optic nerves were attacked by
those high powered antibiotics necessary to stomp on those high powered
infections! Her vision was almost destroyed. She can now read ONE LETTER
at a time! But it has to be about the size of your computer monitor.
However, good news, her vision has now improved to where she can read a
whole word at a time.
On Fri, 8 Nov 2013 22:48:38 -0800 (PST), Higgs Boson
You don't have to read to want to see well, or if you think you do,
then that percentage times the percentage who could no longer see well
is the fraction who were very happy. Can you imagine how happy they
Hey, I read the url and it says an average of 30 or 40%. That's
plenty of people. And among some groups it was much higher.
Plus, I said "after". Now, or at least recently, there have been
populations that didn't have access to glasses, but then gained
Maybe you weren't trying to contradict me. Usenet is so quarrelsome
that people who reply to posts are trying to contradict maybe 80 or
90% of the time.
AFAIK, there are no restrictions, just no market. The number of
combinations needed doesn't make it practical.
You don't have to spend hundreds of dollars on a pair of prescription
glasses. I've had very good luck with Zenni Optical. I buy a good
pair of distance glasses from the optometrist (insurance covers most
of the cost), then several pairs of glasses set up for computer work,
sun glasses, etc. from Zenni.
Because they wouldn't be cheap. If they are not cheap, they won't get sold
in bulk like they are at the drugstores.
I once had a pair of reading glasses that was sort of a bifocal - 1.00
reading glass on the bottom, clear glass on the top. I could wear them all
day while working on projects. Now that I need way above 1.00, walking
around with reading glasses on, especially on stairs, is dangerous. I am
constantly putting them on and taking them off. I wish I could find a pair
in my numbers with upper clear, but I haven't been able to.
Last year I had a special pair of bifocals made. I spend a lot of time in
meetings where I am 5 feet from a computer screen and also have to take
notes. I don't usually need distance glasses, but I can't see a computer
screen at five feet well enough to work on spreadsheets, etc. The eye doc
had one of his assistants come into the exam room and hold an eye chart
five feet in front of me. He then did the "better 1 or better 2” thing
until he found the prescription that worked at 5 feet. He then went through
the process for a reading glass prescription and made a pair of bifocals
that I use just for the meetings.
I found a good compromise was the glasses with magnets that join the
frames together at the front (think the ME from CSI:NY if you are
familiar). I break them apart and wrap them around my neck when I don't
need them for awhile, yet I don't lose them like I tend to do with the
others. Also, when I break them apart, it often confuses who I am
talking to for a couple of minutes- grin)
“Statistics are like bikinis. What they reveal is suggestive,
but what they conceal is vital.”
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