Acute conjunctivitis, also known as pink eye, is highly contagious and frequently occurs during the spring and autumn seasons. The onset of the disease is sudden with an incubation period of one to three days. The disease can affect both eyes either simultaneously or one to two days apart. The inflammation is most severe three to four days after onset and then gradually subsides. The duration of the disease is generally less than three weeks. The main clinical symptoms include a foreign body sensation, burning, itching, photophobia, tearing, and increased discharge.