Pinhole glasses are something of a phenomenon.
They allow anyone with blurry vision to see clearly
- instantly - without the need for corrective lenses.
You can test the concept right now. Make a fist
and put it up to one eye, with the other eye closed.
Open your fist just a tiny miniscule amount, just
enough to create a small hole to peep through.
Amazingly, you can now see clearly!
It's a bit miraculous, isn't it? What's more,
there is lots of anecdotal evidence to show that
wearing pinhole eyeglasses can improve your vision
naturally in just 15 minutes each day. While optometrists
have been reluctant to carry out the necessary
clinical trials to verify this, my personal experience
leaves me with little doubt that pinhole glasses
can improve vision naturally with daily use.
In fact, I believe that pinholes are an excellent
support to daily vision training,
Pinhole glasses, or stenopeic glasses, are an
alternative to conventional eyeglasses to improve
vision. The shape and design are similar to normal
frames, but the difference is in the lenses. Instead
of a lens, pinhole glasses have a series of pinhole-size
perforations in a sheet of plastic, and each hole
allows only a small beam of light to enter the
Pinhole glasses are worn like normal glasses.
Instead of transparent glass or plastic for lenses,
opaque black plastic "lenses" are used.
Wearers see through small holes (pinholes) in the
To fully appreciate how pinhole glasses work it
is necessary to understand how the eye processes
light rays to form an image.
How the eye works:
Our ability to "see" starts when light
reflects off an object at which we are looking
and enters the eye. As it enters the eye, the light
is unfocused. The first step in seeing is to focus
the light rays onto the retina, which is the light
sensitive layer found inside the eye. Once the
light is focused, it stimulates cells to send millions
of electrochemical impulses along the optic nerve
to the brain. The portion of the brain at the back
of the head (the visual cortex) interprets the
impulses, enabling us to see the object.
Light, refraction and its importance.
Light entering the eye is first bent, or refracted,
by the cornea -- the clear window on the outer
front surface of the eyeball. The cornea provides
most of the eye's optical power or light-bending
After the light passes through the cornea, it
is bent again -- to a more finely adjusted focus
-- by the crystalline lens inside the eye. The
lens focuses the light on the retina. This is achieved
by the ciliary muscles in the eye changing the
shape of the lens, bending or flattening it to
focus the light rays on the retina.
This adjustment in the lens, known as accommodation,
is necessary for bringing near and far objects
into focus. The process of bending light to produce
a focused image on the retina is called "refraction".
Ideally, the light is "refracted," or
redirected, in such a manner that the rays are
focused into a precise image on the retina.
Click picture for larger eye chart
Most vision problems occur because of an error
in how our eyes refract light. In nearsightedness
(myopia) the light rays form an image in front
of the retina. In farsightedness (hypermetropia),
the rays focus behind the retina. In astigmatism,
the curvature of the cornea is irregular, causing
light rays to focus to more than one place so that
a single clear image cannot be formed on the retina,
resulting in blurred vision. As we age, we find
reading or performing close-up activities more
difficult. This condition is called presbyopia,
and results from the crystalline lens being less
flexible, and therefore less able to bend light.
Perfect vision in the unaided eye requires the
eye lens to focus light rays from diverse angles
into a single pinpoint directly on the retina at
the back of the eye. For sufferers of refractive
eye disorders, where the eye lens is too weak or
the cornea or eyeball is misshapen, divergent light
rays become focused in front of or behind the retina,
casting an unfocused image onto the retina itself.
This unfocused area of light is known as the 'blur
do Pinhole Glasses Work?
Pinhole glasses are a
natural form of vision correction, that can never
harm your eyesight.
In contrast, glasses and
contact lenses only correct your vision superficially
and are known to make your vision worse over
Contrary to their name, pinhole eyeglasses are
not made of glass or corrective lenses. They are
simply black plastic (or metal) with holes punched
through where the lens would normally be.
So, how do pinhole
In camera terms, pinhole glasses
(also called spectacles, eyeglasses and sunglasses)
reduce the effect of the eye's focusing errors
by increasing optical depth of field by reducing
Pinhole glasses work based on the concept that
each hole only allows a narrow beam of light through.
This reduces the size of the optical spot not coming
into perfect focus on your retina and increases
your depth of field.
The lenses of pinhole glasses are perforated
with an array of equally spaced minute holes of
approx 1mm - 1.5mm in diameter. In contrast the
average diameter of the pupil in normal daylight
conditions is about 4mm. Each pinhole allows only
direct rays through, and it is the amalgamation
of these direct rays that make up a concentrated
beam of light that enters the pupil. When this
restricted light beam passes through the pupil
and into the eye lens, the effects of any refractive
eye disorders are reduced as the 'blur circle'
on the retina is proportionally smaller. The resulting
visual image is one of increased clarity, definition
|The unaided weak eye without
|In a weak eye, light rays entering
the eye's lens are not all focused onto
the same place on the retina. For example
rays a b f g, require more focusing by
the lens to hit the same plane as rays
c d e, which are nearer to the centre.
Rays c d e are usually always in focus,
regardless of the condition of the eye,
and form a clear image on the retina.
This clear image is flooded by the blurred
image known as the "blur circle" formed
by rays a b f g.
weak eye with Pinhole Glasses
|When the pinhole lens is used, only
rays c d e are allowed to form an image
on the retina and no blur circle is present
to block the clear image. Consequently,
by using a lens with multiple pinholes,
many focused images form on the retina
and a clear, natural image is seen. Also,
no effort is required from the eye muscles,
as the only rays entering the eye are
already in focus. Hence there is a dramatic
consequential, relaxing effect.
Pinhole glasses are based on the
principle of natural reflexes as the same effect
is achieved when you squint to try and see more
clearly. Your eyelids close around the top and
bottom of your eyes, filtering out light rays reaching
your pupil from these angles. Only light from your
central area of vision and to the left and right
sides can now enter your eye. The image you see
is often sharper with a greater depth of resolution,
and is generally brighter as there is a narrower
range of light levels to contrast against each
other. Wearing pinhole glasses is of course much
less stressful on the eye than squinting, and is
far more efficient at blocking extraneous light
rays to produce a sharper and brighter image on
Just look through any pin-hole and
you'll see what they mean. When you do this, blurred
images become focused. This is because the amount
of peripheral light rays (which are responsible
for blurring) is reduced. With appropriately spaced
multiple pin-holes, you'll get clear straight vision
without the difficulty of concentrating on a single
hole. Regular use of these special pinhole glasses
helps exercise eye muscles and helps eyes relax
at the end of a tiring day and thus has a beneficial
effect. Particularly useful for those who spend
a great deal of time looking at computer and/or
TV screens, Pinhole Glasses help retrain your eye
muscles, just as other forms of exercise retrain
For people who have been diagnosed with myopia,
hyperopia, presbyopia, astigmatism or cataracts,
pinhole glasses offer instant relief through better
vision. You'll really notice the difference when
focusing in the middle to long distance, such as
when watching TV or reading from a classroom blackboard.
Users of pinhole glasses report almost perfect
vision and have little difficulty reading words
or seeing definition in a TV image WITHOUT THEIR
What are Pinhole
1. Prevent Computer Vision Syndrome - if you
use computers a lot you will recognize the signs:
eye strain, dry eyes, fatigue, headache, blurry
vision and double vision. This is all down to intense
near point stress. Computer glasses can reduce
the glare from the monitor, help relax the eyes,
increase depth of field, and increase your natural
focusing power (also known as accommodation).
• Because of the way pinholes minimize light
to the eye, they work well as sunglasses or for
extremely bright conditions. They also work well
in reducing the visual stress of lengthy computer
2. Relieve Eye Strain and Improve Your Vision
- when I wear pinhole eyeglasses, I get a clear
long distance focus without any eye strain. This
is very supportive for reducing myopia. In fact,
some users report that wearing pinhole glasses
for just 15 minutes a day can noticeably improve
your vision in 4 weeks. If you have farsightedness,
you need simply read and write with pinholes on,
while nearsighted people need just sit back and
watch TV wearing pinholes.
with cataracts often see better through pinholes.
A cataract doesn't allow light to enter the eye
properly. Pinholes often improve the vision even
with the existence of the cataracts.
If any person is chronically myopic and is diagnosed
with more than 6 diopters of near-sightedness,
then pinhole glasses may not improve their vision
significantly due to excessive problems with diffraction.
"When used for reading or other close work,
pinholes reduce the amount of accommodation or
focusing power that the eye must use to see clearly.
There is an abundant amount of research that points
the finger at excessive accommodation as the cause
of acquired myopia.
It is clear that anything that can reduce this
accommodative effort, including pinhole glasses,
is a useful weapon in retaining good vision. It
is for this reason, and the fact that those in
the optical business want nothing to do with them,
that we have decided to promote the use of pinholes
on this website. These glasses could be a major
tool in preventing myopia.
Its well proven Pinhole glasses make it easier
to read and do other close-up work. They easily
take the place of expensive prescriptions glasses,
and they are durable enough to last a lifetime.
REMARKS OF AMERICAN
DOCTORS ON THE INVENTION
Dr. Janet Goodrich(a distinguished eye-sight-correcting
" People with both close and distant blur and astigmatism are able to use
micohole sight correctors."
Dr. David Michael(author of Visual Optics and Refraction)
" Microholes reduce aberrations and light scattering, isolate a favorable
area of the damaged cornea and increase depth of focus."
Dr. Norman Bies(author of Correction of Subnormal Vision)
" The longer depth of focus obtained through microholes is well established
--- patients enjoy a substantial increase in reading distance."