Pinhole Glasses - for real??
I got a "link exchange request" from these folks who sell special glasses on the Internet, to wit;
In a healthy eye, light rays are focused into a single point on the light sensitive retina at the back of the eyeball. Depending upon the type of refractive disorder endured, less healthy eyes focus light rays in front of or behind the retina, casting a 'blur circle' on the retina itself. The minute pinholes on the surface of the plastic lenses of your pinhole glasses effectively stop down the aperture of the eye's pupil, so pass a narrower beam of light through to the eye lens with a greater depth of field. The narrow beam casts a smaller blur circle on the retina, improving your vision.
Pinhole Glasses
I'm kind of leery of special glasses since I saw that old sci-fi movie about a guy that developed X-ray vision and clawed his own eyes out at the end.
In a healthy eye, light rays are focused into a single point on the light sensitive retina at the back of the eyeball. Depending upon the type of refractive disorder endured, less healthy eyes focus light rays in front of or behind the retina, casting a 'blur circle' on the retina itself. The minute pinholes on the surface of the plastic lenses of your pinhole glasses effectively stop down the aperture of the eye's pupil, so pass a narrower beam of light through to the eye lens with a greater depth of field. The narrow beam casts a smaller blur circle on the retina, improving your vision.
Pinhole Glasses
I'm kind of leery of special glasses since I saw that old sci-fi movie about a guy that developed X-ray vision and clawed his own eyes out at the end.
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