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photorefractive effect
(redirected from photorefractive)

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.03 sec.
photorefractive effect [‚fōd·ō·ri′frak·tiv i′fekt]
(optics)
An effect displayed by many electrooptic materials in which a change in the index of refraction is induced by the presence of light, and this change is retained for a time after the light exposure ceases.


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These corneal sculpting techniques are known as photorefractive keratectomy and in situ keratomileusis (PRK and LASIK respectively).
Two common procedures are photorefractive keratectomy, or PRK; and laser in-situ keratomileusis, or LASIK.
The pot of gold in front of both groups is a relatively new - and expensive - laser procedure known as photorefractive keratectomy, which corrects nearsightedness by slightly flattening the cornea.
 
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