Spring conjunctivitis, also called spring catarrhal conjunctivitis, is a kind of allergic ophthalmopathy characterized by unusual ocular itching in clinic. As a seasonal and periodical disease, it often starts in warm spring and becomes worse in summer and relieves or disappears in autumn and winter. In the coming spring, it relapses and lasts several or dozens of years without recovery, but it may gradually turn better and even recovered as the patients are aging. The case is common in children and young people with the male more than the female, and both eyes are usually affected in most cases.