Bacterial and viral infections of the eye differ from each other in terms of the type of microorganism causing the disease, signs and symptoms, and treatment modalities. Bacterial infections are caused by Staphylococcus epidermidis, Staphylococcus aureus, and Pseudomonas aeruginosa, while viral infections are caused by adenovirus, herpes simplex virus, etc. Cultures of the causative organisms and the results of drug sensitivity tests also differ between the two. The signs and symptoms of each are also different. Bacterial infections may appear as a mass of suppurative foci, and there will be obvious redness, swelling, heat and pain and other manifestations of infection. Viral infections, such as herpes zoster virus infection, may be associated with severe pain in the trigeminal nerve distribution or dendritic foci in the cornea with corneal hyperalgesia. The medications needed to treat the two infections are different, with penicillins and quinolones used to treat bacterial infections, while antiviral drugs such as acyclovir and ganciclovir are needed for viral infections. Patients with eye infections are advised to seek prompt medical attention to assess their condition and follow the doctor’s instructions for treatment.