In most of the retina, many rods or cones connect one bipolar cell so a particular region of the brain receives visual input from several nearby rods or cones and vision is not high-definition. High acuity is possible in the fovea, where each cone makes a connection to one bipolar cell and each bipolar cell connects to one ganglion cell. Thus the light information from a very small part of the visual field is received by many brain cells and the object is magnified. Rods all are sensitive to the same wavelength of light, but cones come in three different sensitivities, blue, green, and red. 52.20 color vision Color blindness comes from a lack in one of the cone opsin molecules as a result of a mutation in the gene for that opsin.
Binocular vision depends on theoverlap of the two visual fields of both eyes.