Choroidal dystrophies : Overview, Causes, & Risk Factors

Definition

Choroidal dystrophy is an eye disorder involving the choroid, a layer of blood vessels between the sclera and retina.

Overview, Causes, & Risk Factors

Choroidal dystrophies are usually due to an abnormal gene (hereditary). It usually affects males, starting in childhood.

Pictures & Images

External and internal eye anatomy

The cornea allows light to enter the eye. As light passes through the eye the iris changes shape by expanding and letting more light through or constricting and letting less light through to change pupil size. The lens then changes shape to allow the accurate focusing of light on the retina. Light excites photoreceptors that eventually, through a chemical process, transmit nerve signals through the optic nerve to the brain. The brain processes these nerve impulses into sight.


Review Date : 10/27/2009
Reviewed By : Linda J. Vorvick, MD, Medical Director, MEDEX Northwest Division of Physician Assistant Studies, University of Washington, School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.

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