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If you're a person with normal vision acuity — a rating of 20/20— and you gaze horizontally from around 5 feet (152.4 centimeters) above the ground, you can see about 3 miles (5 kilometers) into the distance, which is the point at which the Earth's curvature bends away so that t...
Astigmatism is a type of distorted vision caused by a defect in the curvature of the cornea or lens of the eye. Most people with astigmatism can see clearly those objects directly in front of them, but their peripheral vision -- perhaps above and below, or to the right and left sides, ...
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Capability for chromatic and achromatic aberration, focal plane bokeh distinction, astigmatism and vignetting effects, bespoke aperture maps, and noise recovery are among the advanced features. There will also be compatibility with the alpha channel and transparency, 32-bit floating-point color, correct...
They have some astigmatism, especially at the edge of the field. They are popular eyepieces. Nagler eyepieces were introduced in 1982, advertised as "like taking a spacewalk." They have a seven-element design with an incredible 82-degree field of view. They come in 2-inch barrel size ...
Glasses-wearers withastigmatism Hunters that wear sun-glasses and don't want to remove them Glasses-wearers who don't want to remove them during use Contact-wearers that would prefer to wear their glasses so as not to compromise on image quality due to contacts drying out and having to bl...
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however...
Femtosecond laser surgery.In this operation, your surgeon uses a laser to break up the lens. As with the other types, once this is done, they'll put in the new lens. Your doctor may suggest this if you also have anastigmatism, a curve of your cornea that makes your vision blurry. Yo...
Other people do not see clearly because their eyes are not exactly the right shape. They have what is called astigmatism (散光). This, too, can be corrected by glasses. Some people’s eyes become cloudy because of cataracts (白内障). Long ago these people often became blind. Now, however...