Pinhole technology is not a new discovery – far from it. As far back as the 5th Century BC, the ancient Chinese people discovered that light passing through a tiny pinhole makes an image on the background it falls upon. Aristotle (384-322 BC), the great Greek philosopher, expanded on this, laying down the principle of pinhole imagery. The first real application of pinholes came over 1,000 years later when Alhazen (Ibn Al-Haytham), used the principle to invent the pinhole camera – a light tight box through which a pinhole on the front surface of the box allows direct light rays to enter and form an image on the back of the box. This idea of capturing an image drove inventors and scholars in Renaissance Europe to explore the science of pinholes further, discovering that light moved in straight lines, unless refracted by a lens or some media that acted like a lens. This led to the invention of the Camera Obscura as a way of capturing a large image through a small lens.
Pinholes have been used to aid vision for hundreds of years. There is evidence that Eskimo communities have used fabrics and wood with narrow slits in as a primitive form of pinhole glasses, in order to protect their eyes from the glare of the sun off the snow and ice for many centuries. In the mid 20th Century, pinhole glasses for public use were pioneered. Although the first prototypes of pinhole glasses were unattractive, heavy and cumbersome to use, technological advances in materials, lasers and production methods have meant that the pinhole glasses of today are high-tech in comparison.
The medical profession too have adopted the science of pinholes as a way to measure visual acuity and to detect refractive vision disorders in their patients. Ophthalmologists often use a pinhole occluder to gauge visual acuity on a 20/20 or 20/50 scale, and also to determine the extent of a patient’s refractive error (measured in diopters). This device is essentially a pinhole which is held very close to the patient’s eye, and works on the principle that anything seen through a tiny hole will always be seen in focus. If the patient can see a target image through the pinhole more clearly than without the pinhole, then traditionally ophthalmologists prescribe eye glasses (logically, the ophthalmologist should prescribe pinhole glasses as he/she would have just proved that pinholes do improve vision!)If you're looking to strengthen your eyes effortlessly and naturally, this very well may be the most valuable video you ever watched on the topic. -- Click Here To Watch The Free Special Video Report --