What Is Macular Edema? Macular edema is swelling or thickening of the eye's macula, the part of your eye responsible for detailed, central vision. The macula is a very small area at the center of the retinaâa thin layer of light-sensitive tissue that lines the back of the eye.
What is perception? The process by which individuals select, organize, and interpret the input from their senses (vision, hearing, touch, smell, and taste) to give meaning and order to their environment. Through perception, people try to make sense of their environment and the objects.
(4) Stereo depth perception in far vision: The relative difficulty of each of the nine steps in this series is determined by the angular disparity of the 'key' ring in each group. This level of difficulty is expressed as a percentage of theoretical maximum stereopsis according to the Shepard-Fry formula. Stereopsis depends on combining the images received by each eye into one image. The recognition of the relative distances between oneself and different objects, with ability to orient one's position in relation to them, is the basis of depth perception. .