Pupillary disorders refer to abnormalities in the size, shape, or reaction of the pupil, the opening in the center of the iris that controls light entry into the eye. Common disorders include anisocoria, where pupils are unequal in size, and miosis or mydriasis, which involve constricted or dilated pupils, respectively. These conditions can result from various factors, including neurological issues, medications, or eye injuries. Diagnosis of pupillary disorders typically involves a comprehensive eye examination and may include tests to assess visual acuity and eye movement. Treatment depends on the underlying cause and may involve medications, surgery, or monitoring. Understanding these disorders is essential for maintaining overall eye health and function.