<unk>  describes the relationship between different types of cells in the<unk>  cone photoreceptor cells, bipolar cells, and ganglion cells. With high<unk> , a large number of photoreceptor cells converge on a smaller number of bipolar cells in transferring their signals to ganglion cells. Zero<unk>  occurs when each cone photoreceptor cell contacts a single ganglion cell via a single bipolar cell. High<unk>  increases sensitivity to light at the expense of visual acuity. Low<unk>  results in high visual acuity, with individual photoreceptor cells sending their own signals. High<unk>  yields high sensitivity to low light levels, where the signal is summed before reaching the brain—presumably advantageous when the signals reaching individual photoreceptor cells are weak. High<unk>  is an adaptation to low light levels, and low<unk>  to high light levels (thus sharpening the images).
Retinal summation
Scotopic vision
Photopic vision
Epineurial repair
Mesopic vision
Smooth pursuit
Visual temporal integration
Monocular vision