You searched for: “aphotesthesia
aphotesthesia (s) (noun), aphotesthesias (pl)
A physical condition that is caused by excessive exposure to sunlight: Aphotesthesia is characterized by a reduced retina sensitivity of the eyes to light.

The retinas are the areas at the back of a person's eyes which send light signals to the brain and where those signals are changed into images that may result in aphotesthesia when they are overexposed to sunlight.