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Because of their thin, narrow frames, you can treat these readers almost like bifocals—if you have otherwise-fine eyesight, they’re easy to peer over. They also come in a wide range of ...
Adjustable focus eyeglasses are eyeglasses with an adjustable focal length. They compensate for refractive errors (such as presbyopia) by providing variable focusing, allowing users to adjust them for desired distance or prescription, or both. Current bifocals and progressive lenses are static, in that the user has to change their eye position ...
Pinhole glasses, also known as stenopeic glasses, are eyeglasses with a series of pinhole-sized perforations filling an opaque sheet of plastic in place of each lens. Similar to the workings of a pinhole camera, each perforation allows only a very narrow beam of light to enter the eye which reduces the size of the circle of confusion on the ...
Pince-nez. Pince-nez (/ ˈpɑːnsneɪ / or / ˈpɪnsneɪ /, plural form same as singular; [1] French pronunciation: [pɛ̃sˈne]) is a style of glasses, popular in the late 19th and early 20th centuries, that are supported without earpieces, by pinching the bridge of the nose. The name comes from French pincer, "to pinch", and nez, "nose".
The best eyeglasses for your face shape. Logan Sowa. Updated July 14, 2016 at 9:52 PM. Show comments. ... Good Housekeeping. Check your pantries! 12 brands of cinnamon are unsafe to eat, experts ...
Optics and vision. Vision of humans and other organisms depends on several organs such as the lens of the eye, and any vision correcting devices, which use optics to focus the image. The eyes of many animals contains a lens that focuses the light of its surroundings onto the retina of the eye. This lens is essential to producing clear images ...
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