Some people wake up in the morning and find that their eyes are very uncomfortable, with obvious sensations such as photophobia, tearing, and extra discharge from the eyes. It is only when they go to the hospital that they discover that it is keratitis. If keratitis is not treated and the inflammation exists for a longer period of time, the pupil area and retina will suffer some damage due to the inflammation, and the damage may be permanent in terms of vision, and the consequences of this type of keratitis are very serious. The following is an introduction to viral keratitis and bacterial keratitis, so you can avoid unnecessary harm by understanding them in advance. Bacterial conjunctivitis: The onset of bacterial conjunctivitis is more acute, the symptoms are heavier, the eyes are congested and foreign body feeling is stronger, the secretions are also more, generally more yellow hundred and green, but also more hard. Antibiotic eye solution is fast acting. The main manifestations are pain in the affected eye, lacrimation, photophobia foreign body sensation and vision loss; green pus corneal ulcer is characterized by a rapid onset, the beginning of severe eye pain, vision loss with redness, photophobia and lacrimation. Viral conjunctivitis: Viral conjunctivitis has an incubation period of 3 – 5 days, with mild symptoms, soft discharge, and the characteristic of being able to pull silk. It is associated with colds and decreased resistance. Can be self-healing. It takes about a week to heal even after ordering antiviral eye medication. Viral conjunctivitis is highly contagious by contact and spread by droplets, pollutants and inoculation from the hand to the eye. To avoid cross-contamination, the physician must wash hands thoroughly after examining the patient and disinfect the instruments used. Patients should be instructed to wash their hands thoroughly after contact with their eye or nasal secretions and to avoid contact with the infected eye followed by contact with the non-infected eye. Avoid sharing towels and pillows. Ocular secretions must be removed and the affected eye should not be encapsulated. Viral conjunctivitis is self-limiting, lasting 1 week in mild cases and up to 3 weeks in severe cases, and patients are prohibited from entering public baths and swimming areas. Both diseases are contagious and are usually clinically mixed, so it is best to combine the two drugs.