The correct answer is B. Photophobia is abnormal intolerance of light. It is a condition in which the eyes are very sensitive to light, and even normal levels of light can cause pain, discomfort, and even temporary blindness. Photophobia can be caused by a number of things, including eye diseases, certain medications, and even emotional stress.
Option A is incorrect because photophobia is not the ability to perceive light. This ability is called photoreception, and it is a normal function of the eyes.
Option C is incorrect because photophobia is not the adjustment of the eye for light. This adjustment is called accommodation, and it is a normal function of the eye that allows us to see clearly at different distances.
Option D is incorrect because photophobia is not a disease caused by too much sunlight. However, too much sunlight can aggravate photophobia in people who are already sensitive to light.