Conjunctivitis is one of the most common diseases in ophthalmology. Its causes can be divided into microbial and non-microbial categories. It is mainly transmitted through contact, so it is necessary to pay strict attention to personal and public hygiene. It is advised to frequently wash hands and face, and to avoid wiping eyes with hands or sleeves. Patients in the acute phase need to be isolated to prevent transmission and avoid outbreaks. Strict disinfection of the patient's used face washing implements, towels, and contacted items is also necessary.