Pinhole Glasses have a series of pinhole-sized perforations filling an opaque sheet of plastic in place of each lens. Each perforation allows a very narrow beam of light to enter the eye which reduces the size of the circle of confusion on the retina and increases depth of field. Eyes with refractive error may help create a clearer image. Pinhole Glasses produce an image without the pincushion effect around the edges (which makes straight lines appear curved). Pinhole glasses are also called stenopeic glasses. Pinhole glasses reduce brightness and peripheral vision, and thus should not be used for driving or when operating machinery. Pinhole glasses exercise the focusing muscles of your eyes and can correct vision permanently when worn for only 15 minutes a day. The major cause of the long-sightedness that comes with advancing years is a weakening of the focusing muscles that control the eye lens. Looking through the tiny holes forces the eye muscles to exercise which might lead to sharper vision. “Eye doctors, both ophthalmologists and optometrists, for many decades have used pinhole glasses clinically to help determine certain things with a patient’s eyes in clinical practice,” said Dr Larry Patterson, a practicing ophthalmologist in Crossville.
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Pinhole Glasses are definitely a useful tool for Vision Education: they're equally definitely not a substitute for it. Pinhole Glasses aren't an instant panacea, but used with intelligence and imagination will absolutely help in the quest for improved vision.
- Using the Pinhole Glasses 15 - 20 minutes a day may bring a noticeable improvement within a couple of weeks.
- While Pinhole glasses may be useful for people who are both near- and far-sighted, they are not recommended for people with over 6 diopters of myopia.
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Q - Whats the origin of Pinhole glasses?
A- It is not known who invented the pinhole glasses, but the scientific principles of pinhole effects were discovered many centuries ago. Pinhole glasses are widely sold in America, Europe and Australia as substitutes to prescription glasses since the 1950’s at least. The basic optical principles of the pinhole are commented on in Chinese texts from the fifth century BC. Chinese writers had discovered by experiments that light travels in straight lines. The philosopher Mo Tsu was the first – to our knowledge – to record the formation of an inverted image with a pinhole or screen. Aristotle (fourth century BC) comments on pinhole image formation in his work Problems. d. Sir David Brewster, a Scottish scientist, was one of the first to make pinhole photographs, in the 1850s.
Q - What is the benefit of Pinhole Glasses?
A - They help relieve strain and stress caused by prescription glasses, and yet enabling clearer vision. Pinhole Glasses Promote an important vision habit to perfect vision – central vision, since you can see clearly only straight ahead centrally. They train your mind, eyes and muscles to see without dependence on your prescription eye crutches.
Q - Are there side-effects?
A - None, except that due to the restricted peripheral vision, one should not wear the Eyewear when driving or moving about outdoors for safety considerations.
Q - When and how long do you wear the Pinhole Glasses
A - Frequent substitute of prescription glasses (TV, computer, reading).
Q - How long do we need to wear them to experience vision improvement?
A - It is not the length of time wearing them to achieve vision improvement but reducing or eliminating the root cause of vision challenges – stress and strain in the visual system, minimise the use of prescription glasses helps.
Q - How do i know my vision has improved?
A - The world has become clearer, and your existing pair of glasses feels over-powered and may even cause a headache. You can also use a Snellen Eye Chart to measure your vision improvement. You should consider using your previous pair of lowered-powered glasses or have the lenses stepped-down.
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