Eye infections are a common medical issue that can be caused by a variety of factors. Two of the most common types of eye infections are styes and sties. A stye is an infection of the eyelid caused by bacteria, while a stie is an infection of the sebaceous glands in the eyelid. Both of these infections can cause redness, swelling, and pain in the affected area. Treatment for both types of eye infections typically involves antibiotics or other medications, as well as warm compresses to reduce inflammation.