Pinhole glasses good for computer work?

Hi all.

I'm shortsighted programmer, wearing glasses with -1.0ph/0.5cyl dioptry on
each eye, and after only 2 hours of working in from of my LCD, my eyes hurt
quite a bit. In fact, they hurt all the time, because they don't have time
to rest properly, even after night sleep.

Now, I heard about this pinhole glasses. I've read a bit about how they
work, and I know they will not improve my eyesight, but I'm curious whether
they will put away strain on my eyes when I work in front of computer?

I know they reduce peripheral vision, but I don't need peripheral vision
when I work with computer.
I know they reduce brightness, but I have enough of brightness (probably too
much) from my LCD, so it doesn't bother me also.

So, could it do me good?
And most importantly, can they harm my eyes somehow?

Regards,
Vjeran

 

They won't do any harm to your eyes, so by all means give them a go for
a few hours. You'll probably find them so frustrating that you'll give
up on them before long.

Do you currently wear your distance vision specs while using the
computer? If so, try taking them off. Also, try eye drops (artificial
tears). I assume you've had a thorough eye test recently to exclude any
other causes of sore eyes.

Dom

 

why would you even need glasses for the computer? If your a -1 and sit
1 meter(or closer) you will see better without glasses than with! I am
about a -5 but wear -3.25 glasses for the computer and my eyes have
never felt more relaxed! You dont even need to wear your glasses much
except for driving or watching movies

 

Why don't you try. They come with different pinhole sizes
and patterns. Usually they are the ultima ratio for people
with 20 diopters

For computer work you need glasses with varying focus.
They are expensive and not every optician can make them.
In fact, many sell glasses from cheap manufacturers
and do not know how to handle varying focus glasses at all.
You must specifiy "computer work", and explain what it means
optically, otherwise they will set the upper part of the glasses to
infinity focus, be careful, they are salesmen.
Sometimes you need to look around the office, through the upper
portion of the glass, that is 5 to 7 m distance,
and the shortest distance at the bottom
of the glasses will be keyboard, respectively reading a book,
that is about 40 cm. Set the center to 70 cm or 1 m distance.

I have such glasses and about the same diopters as you.
Can work for hours without problems,
although not the whole day, need to have a walk in the green
sometimes.
w.

 

Doctor told me that even if I don't have any problems seeing things at close
(because I am shortsighted), I should wear glasses constantly, because
adaptation of eye when taking glasses off is not healthy...

 

Pinhole glasses to improve vision is simply a scam- they do not work.
Sometimes dedicated computer glasses with ar (anti-reflective)
coating,
a gradient tint can be of help. Also, sometimes using artificial tears
and
looking away from the monitor every 15 minutes or so can reduce eye
strain. But the pinholes are simply a waste of money.

frank

 

sorry thats not true. In fact using glasses to see from near when you
can see fine without will make vision worse, see pseudomyopia which
eventurally will increase enlongation of the eye.
You have the gift of seeing well from near without glasses, use it!

 

This statement is not true, at least not completely.
What would "work" mean in such a context.
You probably wanted to say,
pinholes are not adequate replacements for optical glasses.

Of course they work, pinholes are physically functioning optical
elements, and can replace a camera lens
Enter "pinhole" in Ebay:
http://cgi.ebay.at/1-Laser-Pinhole-...561755617QQcategoryZ80459QQrdZ1QQcmdZViewItem


And when you combine many pinholes you get that:
http://cgi.ebay.at/Pinhole-Glasses-...563546356QQcategoryZ32907QQrdZ1QQcmdZViewItem


The effect is surprising,
it is worth trying from a physics standpoint,
and may be useful for certain eye illnesses
although I prefer normal glasses

w.

 

Pinhole apertures are commonly used in target pistol shooting to improve
the depth of field by simultaneously reducing the blur of the front and
rear sights as well as the target. There is no conventional transparent
lens which can accomplish that. For certain types of eye defects a
pinhole lens can provide better visual resolution than a full aperture
glass lens. The downside of pinhole lenses is Limited field and reduced
image brightness.

"glasses" with multiple pinholes were used in some parts of the world
long before glass lenses came into use. If the angular spacing of the
holes is approximately equal to the angular field of view of one
pinhole and in a hexagonal pattern. They give greatly improved
resolution, particularly for us old folks who have limited focus
accommodation. The "flys eye" effect takes some getting used to.

 

They work, and they work really well.

My son has a huge cast on his arm. It works really well also. I don't
have such a cast, or want one. I'm sure my HMO would refuse to put one
on.

My wife hurt her foot some time back. She used crutches for a little
time. I don't use crutches. I don't want crutches.

 

Yep. sun glasses. Reduce the BLUE.

 

Dear Vjeran,

Subject: Pinholes and other alternatives
to "relax" accommodation.

Sometime long work at a computer terminal creates "pseudo-myopia" a
condition where you MIGHT fail the eye-test.

In addition to pinhole glasses, you might
consider using "relaxing" plus lenses which you can obtain
over-the-counter for about $8.

Some ODs will prescribe this lens for children on the threshold of
myopia, to
help them "relax" their eyes.

www.myopiafree.com

Best,

Otis

 

Or he can take his glasses off, save some money and get the same
result.

A script of -1.00/-0.5 R&L means you are focussed at 80cm so you are
pretty well focussed on the screen with no Rx. There is no problem
doing this for most people and no adaptation problems either. Try it,
you may find it improves things.

grant

 

I think you'd better wear an coated glass rather than pinhole glasses. I had
a pair of pinhole glass in high school and I know how it works: it just
force your eye to use the most sensitive part -- center of your retina where
the cell is smaller than usual and the paraxial optical quality is better.
As a result, the radiance from the computer starts to hurt your most
sensitive part of your eyes... Pinhole glasses is traditionally used for
ophthalmologists, to test the vision of your central part of the eye.
So, keep using your eye in a healthy way is the best solution. The
coating and resin-based glasses will work because the transmission of UV is
nearly 0. Eyedrops (artificial tear) will keep your eye cells "breath" and
alive. Wish these help.
Sincerely,
Peng

 

I've never heard of the word "paraxial" and neither has my dictionary.

It's nice that you know they work, however, I don't believe that is
correct.

There are three ways that I know of that pinhole glasses help vision:

1. They increase the depth of field. If you can't focus near (or far),
the pinhole glasses may increase your range to where things are in focus.

2. If you are astigmatic, then the pinhole glasses remove that problem.

3. If you have cataract, then the pinhole may allow you to find an area
through the cataract that is clearer.

 

You must be kidding: there are 721 entries for the word "paraxial" in
Google Search, Sci. Optics.

Grandpa.

 

I took an optics course. It was in 1969, and was a one quarter physics
class.

 

I think Ian omit a fact: what if the pinhole glasses has only 1 hole? Can
you see the world as it was without the glasses? You may think that this is
kidding, but have you done a simple experiment?
The glasses I used has 3 holes on each eye, with totally black plastic
glasses to block light. I happen to have no black paper to do this but I did
use white paper board to prove my point.
I think most of us are near sight and able to do this immediately.
Remove your glasses and put a pinhole on your eye, find a target you cannot
see clear (even it is monitor screen) and see what can happen?
Pinhole glasses cannot work on a very near-sight eye, however, if the hole
size is proper (to allow enough light come while still able to limit the
light through the pupil), you can see a sharper image.

Ian said that the edge of the pupil can be aberrant -- do you think that the
random edge of a piece of paper is better than our body which is God's
masterpiece?

 

Hehe, in this sense our conclusions are the same -- your point is that the
optical imaging quality for the central part of the lens is better, which is
exactly what I mean. In this way, the field angle is limited; however
because a better lens is used, we can see more sharp.
Another issue I want to address is the cell size -- it is really
smaller than the rest part of retina. When we are using skillfully what God
gives us (by applying a small hole to simulate the shrink of the pupil), we
get a better image under strong incidence. If you look around you will know
that your central part of vision is much much better than the rest, and this
is because of both the cell (as a CCD pixel) size and also the way our brain
deals with the infomation.
Back to the original question, this is unacceptable to an computer user
because he will fell better and then he keeps using it this way, however the
harmful light will still there and hurts.

 

It isn't the light that is harmful. It is the fact that we blink less
when using a monitor and don't refocus the eyes regularly. Our eyes
weren't designed for staring without blinking which is what we tend to
do when working at a monitor.

P. Danek