There are many things that can cause your eye to turn red.

The eye looks red when the blood vessels that are in the conjunctiva (the mucous membrane that covers the white of your eye and the backside of your eyelids) becomes dilated.

Those blood vessels often dilate when the eye gets irritated. This irritation can originate from a problem occurring inside the eye or factors from outside the eye.

The most common external factors that can cause the eye to become red are exposure to infectious...

Fireworks Eye Injuries Have Skyrocketed in Recent Years

Fireworks sales are exploding across the country through the Fourth of July. As retailers are blazing their promotions, we and the AAO are shining a light on this explosive fact--the number of eye injuries caused by fireworks has rocketed in recent years.

Fireworks injuries cause approximately 15,600 emergency room visits each year, according to data from the U.S. Consumer Product Safety Commission. The injuries largely occurred in the...