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lens


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n.1. (in anatomy) the transparent crystalline structure situated behind the pupil of the eye and enclosed in a thin transparent capsule. It helps to refract incoming light and focus it onto the retina. see also accommodation. 2. (in optics) a piece of glass shaped to refract rays of light in a particular direction. Convex lenses converge the light, and concave lenses diverge it; they are worn to correct faulty eyesight. See also bifocal lens, contact lenses, trifocal lenses.

1. (in anatomy) the transparent crystalline structure situated behind the pupil of the eye and enclosed in a thin transparent capsule. It helps to refract incoming light and focus it onto the retina. see also accommodation. 2. (in optics) a piece of glass shaped to refract rays of light in a particular direction. Convex lenses converge the light, and concave lenses diverge it; they are worn to correct faulty eyesight. See also bifocal lens, contact lenses, trifocal lenses.

Subjects: Medicine and Health — Science and Mathematics.


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