AMY-2A Lecture Notes - Lecture 32: Vitamin A Deficiency, Visual Acuity, Cell Membrane
Document Summary
A lot of convergence = a lot of rods go through a single ganglion cell = less information and detail: widely spread throughout the retina, not good for visual acuity. Cones- pigment discs taper off toward the base, membranes are continuous with the plasma membrane; color: require bright light for stimulation, different cones have different pigments specific for certain wavelengths (colors) When you combined them all you get the rest of the colors. White is made up of an equal amount of the 3 colors. Black is made up of no activation of the 3 colors: can convey color information to brain, 1-3 cones per ganglion cell to brain, primarily concentrated in fovea (center) Less convergence = more information, a lot more detail, a lot of light available. Cones are contained in the fovea centralis: essential for visual acuity. *colorblind people have a deficiency in green and red. *more nocturnal = more likely to be colorblind.
