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| Description: Rods and cones, the photoreceptors in the retina that convert light energy into neural impulses, were named for the appearance of their outer segments. Astigmatism is a condition where either the cornea or the lens (or both) has an irregular curve. This causes blurred or distorted vision. Picture Stats: Views: 482 Filesize: 803.25kB Height: 1000 Width: 607 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=41338 |