Bacterial keratitis and viral keratitis can be distinguished from each other in terms of etiology, rapidity of onset, clinical manifestations, and treatment. 1. Etiology: Bacterial conjunctivitis is mainly caused by infected bacteria, such as Staphylococcus aureus, etc. Viral keratitis is usually caused by viral infection through contact with pollutants and droplets. 2. Rapid onset: Bacterial keratitis starts rapidly and patients have severe symptoms, while viral keratitis starts slowly and patients have mild symptoms. 3. Clinical manifestations: bacterial keratitis eye will appear a large number of purulent secretions, a strong sense of foreign body, photophobia, tearing, eye pain, etc., while the viral keratitis secretions are less, mainly manifested in tears, etc.. 4. Treatment: patients with bacterial conjunctivitis need to carry out drug sensitivity tests, clear pathogenic bacteria after the choice of antibacterial treatment, during the choice of levofloxacin eye drops, buramycin eye drops and other antibiotic drug treatment. Viral keratitis patients need to carry out antiviral treatment, such as acyclovir, vasiclovir eye drops and so on. It is recommended that patients with keratitis consult a hospital in a timely manner to assess their condition and follow the doctor’s instructions for treatment.