What is photophobia?
To put it as simple as possible, photophobia, or light sensitivity, is a condition where the eyes feel discomfort or pain when perceiving visible light, which could be any light source ranging from small lightbulbs to sunlight. Although it has the "phobia" in its name, it is not actually a type of phobia, in a psychological sense since having photophobia does not necessarily mean that you fear light sources due to some reason. LIght just hurts your eyes which is why you avoid seeing them too much when you have it. However, when the pain comes too often and becomes too much to handle, those who have photophobia would generally develop a legitimate psychological condition called heliophobia
, which is the genuine fear of sunlight or bright lights.