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 eye.
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 black plastic.
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.