A hard-type contact lens <em>in situ</em>

A hard-type contact lens <em>in situ</em>

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Credit: DAVID PARKER/SCIENCE PHOTO LIBRARY.

Caption: Hard-type contact lens in situ on the cornea of the eye, separated from the highly sensitive tissue by a film of tear fluid. The lens is of the corneal microlens type, ie it covers only the cornea (other types, called haptic lenses, cover a portion of the surrounding white sclera as well). Contact lenses are used as substitutes for glasses in long & short sightedness and other errors of refraction: they may also be indicated in a protective capacity in cases of corneal disease.

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Keywords: anatomy, contact lens, human body, sight, vision, visual sense

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