Bacterial eye infections often develop when bacteria enter the eye through contaminated hands, contact lenses, makeup, or objects that come into contact with the eyes. Poor hygiene, sharing towels, or touching the eyes without washing your hands can increase the risk of infection. People with weakened immune systems, chronic eye conditions, or recent eye injuries may also be more susceptible. Bacterial conjunctivitis, commonly known as pink eye, typically causes redness, swelling, thick yellow or green discharge, and eyelids that stick together, especially after sleeping. Prompt medical evaluation can help determine whether antibiotic eye drops or ointments are necessary.

Viral eye infections are usually caused by viruses responsible for the common cold or other respiratory illnesses. Adenoviruses are the most frequent cause of viral conjunctivitis, although herpes simplex virus can also infect the eyes and may require urgent treatment. Viral eye infections spread easily through direct contact with infected tears, contaminated surfaces, or respiratory droplets. Symptoms often include red eyes, excessive tearing, watery discharge, light sensitivity, and irritation. Unlike bacterial infections, viral infections usually produce clear, watery discharge rather than thick pus. Because they are highly contagious, good hygiene and avoiding close contact with others are important to limit transmission.

Several everyday habits can increase the likelihood of developing either bacterial or viral eye infections. Sleeping while wearing contact lenses, failing to clean lenses properly, sharing eye cosmetics, rubbing the eyes with dirty hands, and exposure to infected individuals all raise the risk. In addition, allergies or dry eyes may make the eye's protective surface more vulnerable to infection. Washing hands frequently, avoiding touching the eyes unnecessarily, replacing old eye makeup, disinfecting contact lenses correctly, and cleaning frequently touched surfaces are effective ways to reduce the chance of infection and prevent it from spreading to others.

In conclusion, bacterial and viral eye infections have different causes but often produce similar symptoms, making professional evaluation important when symptoms are severe or persistent. Bacterial infections result from harmful bacteria entering the eye, while viral infections are commonly caused by contagious viruses such as adenoviruses. Although many mild viral infections improve with supportive care, bacterial infections may require prescription antibiotics depending on the diagnosis. Anyone experiencing severe eye pain, vision changes, significant swelling, increasing redness, or symptoms that do not improve within a few days should seek prompt medical attention. Early diagnosis, proper treatment, and good hygiene practices are the best ways to protect eye health and reduce the risk of complications.

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