Myopic crescent
Myopic Crescent
Myopic Crescent (pronunciation: my-oh-pic cres-cent) is a term used in Ophthalmology to describe a crescent-shaped area of Chorioretinal atrophy that is often seen in patients with high Myopia or nearsightedness.
Etymology
The term "Myopic Crescent" is derived from the word "Myopia", which comes from the Greek words "myein" (to shut) and "ops" (eye), referring to the squinting observed in individuals with this condition. The word "Crescent" comes from the Latin "crescere" meaning to grow, in reference to the crescent moon shape.
Definition
A Myopic Crescent is a crescent or half-moon shaped area of atrophy or thinning that appears around the Optic disc in the retina of the eye. This is typically seen in individuals with high degrees of myopia, and is a result of the stretching and thinning of the Retina and Choroid due to the elongation of the eye.
Related Terms
- Myopia: A condition in which close objects appear clearly, but far ones don't.
- Chorioretinal Atrophy: A condition characterized by the atrophy of the choroid and retina.
- Optic Disc: The point of exit for ganglion cell axons leaving the eye.
- Retina: The sensory membrane that lines the inner surface of the back of the eyeball.
- Choroid: The vascular layer of the eye, containing connective tissues, and lying between the retina and the sclera.
See Also
External links
- Medical encyclopedia article on Myopic crescent
- Wikipedia's article - Myopic crescent
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