Epidemic keratoconjunctivitis is an infectious eye disease caused by viral infection. It is an acute conjunctival and corneal disease that can be prevalent in all parts of the world and in all seasons. The causative agent of epidemic keratoconjunctivitis is adenovirus, with adenovirus type 8 being the most common, often causing outbreaks. Adenovirus type 8 is the main pathogen of epidemic keratoconjunctivitis. After conjunctival inflammation subsides, patients sometimes still feel photophobia, tearing, foreign body sensation and blurred vision. The course of the disease can last for months or years. After the infiltration is gradually absorbed, thin cataracts of varying degrees are often left, which generally have no significant effect on vision.