A pair of ophthalmic lenses in a frame or mounting which is supported by the nose and ears. The purpose is to aid or improve vision. It does not include goggles or nonprescription sun glasses for which EYE PROTECTIVE DEVICES is available.
Deviations from the average or standard indices of refraction of the eye through its dioptric or refractive apparatus.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
A series of actions, sometimes symbolic actions which may be associated with a behavior pattern, and are often indispensable to its performance.
Hard, amorphous, brittle, inorganic, usually transparent, polymerous silicate of basic oxides, usually potassium or sodium. It is used in the form of hard sheets, vessels, tubing, fibers, ceramics, beads, etc.
NATIONAL LIBRARY OF MEDICINE service for health professionals and consumers. It links extensive information from the National Institutes of Health and other reviewed sources of information on specific diseases and conditions.
Artificial implanted lenses.
Hydrophilic contact lenses worn for an extended period or permanently.
Soft, supple contact lenses made of plastic polymers which interact readily with water molecules. Many types are available, including continuous and extended-wear versions, which are gas-permeable and easily sterilized.
Lenses designed to be worn on the front surface of the eyeball. (UMDNS, 1999)
Sterile solutions used to clean and disinfect contact lenses.
Personal devices for protection of the eyes from impact, flying objects, glare, liquids, or injurious radiation.