Spring is here, everything is reviving, and various infectious eye diseases are at their peak. This season is especially important for the occurrence of acute conjunctivitis, also known as “pink eye. The disease is common in all age groups. Red eyes are the basic feature, accompanied by a sensation of foreign body in the eye, with or without eye discharge, tearing, photophobia and loss of vision. It is classified as viral or bacterial depending on the microorganism of infection. Viral infections are often characterized by watery discharge and swollen lymph nodes in front of the ear, in addition to ocular IR; bacterial infections are characterized by secretions that are mostly viscous or purulent. The treatment of different microbial infections is different. Red eye must be taken seriously! First of all, it is highly contagious. Secondly, it can cause other complications, and in severe cases, irreversible loss of vision. In addition, “pink eye” can not be used indiscriminately eye medicine, must be symptomatic. Therefore, once the eye red, eye foreign body sensation and other symptoms, to seek medical attention as soon as possible, so as not to delay the condition and delay the treatment.