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A lens is an optical device with perfect or approximate axial symmetry which transmits and refracts light, converging or diverging the beam. A simple lens consists of a single ...

Lens may refer to: Optics. Lens (optics), an optical element which converges or diverges light Lens (anatomy), a part of the eye; Corrective lens for correction of human vision

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The lens is a transparent, biconvex structure in the eye that, along with the cornea, helps to refract light to be focused on the retina. The lens, by changing shape, functions to ...

Crystalline lens - Eye anatomy ... The crystalline lens is located just behind the iris. Its purpose is to focus light onto the retina.

Lens, city, France Lens (läNs), city (1990 pop. 35,278), Pas-de-Calais dept., N France. During the 19th and 20th cent. it was one of the most important coal centers in N France ...

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Described is the crystalline lens and aspects of this ocular structure.

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Returns an integer containing either the number of characters in a string or the number of bytes required to store a variable.

Returns the number of characters in a string or the number of bytes required to store a variable.

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lens (l nz) n. pl. lens·es. 1. A ground or molded piece of glass, plastic, or other transparent material with opposite surfaces either or both of which are curved, by means of ...

Lens, city, France Lens (läNs), city (1990 pop. 35,278), Pas-de-Calais dept., N France. During the 19th and 20th cent. it was one of the most important coal centers in N France ...

noun. a piece of glass, or other transparent substance, with two curved surfaces, or one plane and one curved, regularly bringing together or spreading rays of light passing ...

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Do you wear contact lenses? If so, there are things you should be aware of, to protect your eyes from permanent damage.

These types of lenses tend to cause mild irritation on insertion, but after the eyes become accustomed, tend to cause no long term damage. Though it is advised that these lenses ...