Retina

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Eye — The eye is the organ of sight, a nearly spherical hollow globe filled with fluids (humors). The outer layer or tunic (sclera, or white, and cornea) is fibrous and protective. The middle layer (choroid, ciliary body and the iris) is vascular. The innermost layer (the retina) is nervous or sensory. The fluids in the eye are divided by the lens into the vitreous humor (behind the lens) and the aqueous humor (in front of the lens). The lens itself is flexible and suspended by ligaments which allow it to change shape to focus light on the retina, which is composed of sensory neurons.

Last reviewed April 27, 2023 by Linda J. Vorvick, MD, Clinical Professor, Department of Family Medicine, UW Medicine, School of Medicine, University of Washington, Seattle, WA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team..

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News and Patient Stories: Retina

Beverly Helps Those With Low Vision Find Their Way

Navigating a world that has suddenly become unfamiliar can be difficult and discouraging. Many with vision loss are reluctant to leave their house or function…

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UF Health researchers’ gene editing approach for eye disorder shows promise in preclinical model

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GAINESVILLE, Fla. — Using a type of “genetic scissors,” University of Florida Health researchers have successfully removed and replaced a malfunctioning gene…

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An adeno-associated virus vector (seen here in green) acts like a pair of “genetic scissors,” eliminating a key protein and knocking out the GUCY2D gene (shown in red).

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