What condition is characterized by abnormal sensitivity to light?

Photophobia is the term used to describe abnormal sensitivity to light. Individuals experiencing photophobia may find bright lights uncomfortable or even painful, leading them to squint or avoid exposure to light sources. This condition can result from various underlying issues such as eye conditions (like uveitis or corneal abrasion), migraine headaches, or neurological disorders.

The other conditions listed are distinct and do not relate to light sensitivity. Ptosis refers to the drooping of the eyelid and does not involve sensitivity to light. Myopia, commonly known as nearsightedness, affects the ability to see distant objects clearly, which is a refractive error rather than a sensitivity issue. Astigmatism is another refractive error caused by an irregular shape of the cornea or lens, leading to blurred vision, but again, it does not involve light sensitivity. Each of these conditions impacts vision differently and does not encapsulate the experience of discomfort or pain associated with bright light that characterizes photophobia.