The retina is the internal layer of the eye that receives and transmits focused images. The retina is normally red due to its rich blood supply.
Update Date 10/22/2011
Updated 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.