Macula - Definition


The macula, sometimes called the yellow spot, is an area on the retina at the back of the eye. The macula contains the central fovea in its center, where visual acuity is best. The normal eye focuses light rays from a visible object onto the fovea which gives a clear and exact image of a certain point. The accommodation for viewing objects located too close is to enable the convergence of rays on the macula. When they do not fall precisely on the macula, it generates a myopic eye when the image is in front of the retina, and a hyperopic eye if the image is behind the retina. Macular degeneration related to age is an alteration of the cells constituting the macula and causes blurred vision, particularly in the center of the visual field, and a distortion of images ...
Published by Jeff. Latest update on December 11, 2013 at 03:48 AM by Jeff.
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