The majority of people with conjunctivitis have a viral form that does not respond to antibiotics, CBC reports. “People with red, itchy eyes and light sensitivity from pink eye are often prescribed antibiotic eye drops that are rarely needed and in some cases prolong symptoms, according to ophthalmology researchers in the U.S.”

Pink eye, or conjunctivitis, is an inflammation of the lining of the inside of the eyelid and white part of the eye. It can be caused by allergies, infections from bacteria or viruses, or just mechanical irritation.”