refers to an impaired sensitivity to light that exists in the center of the visual field when light conditions are poorer. It is thought to be caused by the absence of rods in the fovea area of the eye [Dominique Arago (1786-1853), French physicist]
refers to an impaired sensitivity to light that exists in the center of the visual field when light conditions are poorer. It is thought to be caused by the absence of rods in the fovea area of the eye [Dominique Arago (1786-1853), French physicist]