An eye infection is an inflammation or infection affecting parts of the eye, which can encompass the conjunctiva, cornea, eyelids, or surrounding areas. These infections can be caused by bacteria, viruses, fungi, or parasites, leading to symptoms such as redness, swelling, itchiness, discharge, and discomfort. Conjunctivitis, commonly known as pink eye, is one of the most prevalent types of eye infections, often resulting from a viral or bacterial source. Other types include keratitis, which affects the cornea, and blepharitis, which involves eyelid inflammation.