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Retina

Definition

The retina is the light-sensitive layer of tissue at the back of the inner eye. It acts like the film in a camera. Images come through the eye's lens and are focused on the retina. The retina then converts these images to electric signals and sends them via the optic nerve to the brain.

The retina is normally red due to its rich blood supply. An ophthalmoscope allows a health care provider to see through your pupil and lens to the retina. If the provider sees any changes in the color or appearance of the retina, it may indicate a disease.

Anyone who experiences changes in sharpness or color perception, flashes of lights, floaters, or distortion in vision should get a retinal examination.

Retina

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Retina

References

Yanoff M, Cameron D. Disorders of the visual system. In: Goldman L, Schafer AI, eds.Cecil Medicine. 24th ed. Philadelphia, Pa: Saunders Elsevier; 2011:chap 431.


Review Date: 4/18/2013
Reviewed By: David C. Dugdale, III, MD, Professor of Medicine, Division of General Medicine, Department of Medicine, University of Washington School of Medicine. Also reviewed by David Zieve, MD, MHA, Bethanne Black, and the A.D.A.M. Editorial team.
The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Call 911 for all medical emergencies. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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