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Keratoconus Glossary Q-R

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Radial keratotomy - A surgical procedure designed to correct myopia (nearsightedness) by flattening the cornea with incisions. The procedure is called a radial keratotomy because the incisions resemble the spokes in a wheel. Acronym is RK.

 

Reading glasses - Also called readers. Glasses to help with close work, particularly for people who are presbyopic.

 
Refraction - The bending of light waves as they pass from one medium to another.

 

Refractive surgery - Any surgical procedure that attempts to decrease the patient's refractive error. Typically the surgeon alters the shape of the cornea in order to change the angle at which an image is projected onto the retina.

 

Regression - A backwards shift from the initial visual outcome.

 

Regular astigmatism - A refractive error caused by an irregular shape of the cornea (usually a football shape) in which the curvature is symmetrical across one or more meridians or axes.

 

Retina - Light processing membrane; converts light into electrical impulses that are transmitted to the optic nerve.

 

RGP - Rigid Gas Permeable contact lenses


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