A blind spot is a part of the visual field our brains get no information from. It is the place in the visual field that corresponds to the lack of light-detecting photoreceptor cells where the optic nerve passes through the optic disc of the retina. Since there are no cells to detect light on the optic disc, a part of the field of vision is not perceived. The brain fills in with surrounding detail with information from the other eye, so the blind spot is not normally perceived.