Fig. 22. The cross-sectional view of the retina approximately midway between the central fossa and the far periphery, where the rods more than cones. Full-height picture in kind corresponds to about a quarter of a millimeter. This general scheme is valid for the whole retina, but the details of contacts with large differences between the central fossa, which is projected gaze direction and where our ability to see fine details of the maximum, and the periphery of the retina, where visual acuity is significantly reduced. In the transition from the fovea to the periphery of a network of direct routes from the receptors to the ganglion cells become completely different. In the central fossa at or near the forward path, usually one associated with one cone bipolar cell, and a bipolar - one ganglion cell. However, with the gradual transition to the outside areas more receptors converge on bipolar and bipolar - on ganglion cells. This high degree of convergence that we see more of the retina, together with a very compact routes in the center and around it make it possible to understand why, despite the ratio of 125: 1 between the number of receptors and the number of optic nerve fibers, some part of the retina (its center ) can still provide sharp vision.