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A corrective lens is a transmissive optical device that is worn on the eye to improve visual perception. The most common use is to treat refractive errors: myopia, hypermetropia, astigmatism, and presbyopia. Glasses or "spectacles" are worn on the face a short distance in front of the eye.
Corrective lenses for myopia have negative powers because a divergent lens is required to move the far point of focus out to the distance. More severe myopia needs lens powers further from zero (more negative). However, strong eyeglass prescriptions create distortions such as prismatic movement and chromatic aberration.
ICD-9-CM. 11.71. MeSH. D020731. MedlinePlus. 007018. [edit on Wikidata] LASIK or Lasik (/ ˈleɪsɪk /; " laser -assisted in situ keratomileusis "), commonly referred to as laser eye surgery or laser vision correction, is a type of refractive surgery for the correction of myopia, hyperopia, and astigmatism. [1]
Myopia can be corrected with a concave lens, which causes the divergence of light rays before they reach the cornea. [ citation needed ] Hyperopia or Farsightedness : When the refractive power is too weak for the length of the eyeball, one has hyperopia or farsightedness.
MeSH. D007646. [edit on Wikidata] Radial keratotomy (RK) is a refractive surgical procedure to correct myopia (nearsightedness). It was developed in 1974 by Svyatoslav Fyodorov, a Russian ophthalmologist. It has been largely supplanted by newer, more accurate operations, such as photorefractive keratectomy, LASIK, Epi-LASIK and the phakic ...
Orthokeratology lens. Orthokeratology, also referred to as Night lenses, Ortho-K, OK, Overnight Vision Correction, Corneal Refractive Therapy (CRT), Accelerated Orthokeretology, Cornea Corrective Contacts, Eccentricity Zero Molding, and Gentle Vision Shaping System (GVSS), is the use of gas-permeable contact lenses that temporarily reshape the cornea to reduce refractive errors such as myopia ...
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601 N High Street,, Columbus, OH · Directions · (614) 745-8101GQ Calls it the Netflix of Eyewear - Huffington Post