Eye infections can be caused by either viruses or bacteria, or occasionally by a fungus. Conditions such as pink eye conjunctivitis and blepharitis (infection of the eye lid) cause puffy, swollen, watery and painful eyes. Treatment often involves eye drops and sometimes antibiotics. Other eye diseases such as glaucoma can mimic the symptoms of eye infections, so you should see your doctor if your symptoms don’t rapidly improve by themselves. If you experience any loss of vision, you should immediately seek medical assistance. Follow the links below to find trusted information about eye infections.