Medically reviewed by Johnstone M. Kim, MD Red eyes are caused when blood vessels in the sclera (white part of the eye) swell ...

It's helpful to know that only infectious conjunctivitis (meaning pink eye caused by viruses or bacteria) is contagious.

Blepharitis is a noncontagious eye condition that causes the eyelids to become inflamed, red, and itchy. It causes crusty flakes on the eyelashes and may make the eyes feel dry. The condition can ...

"There are other microorganisms, such as bacteria, that cause Red Eye disease, but this particular red eye outbreak in question is highly suspected to be viral one," said Gichangi. He added ...