Red Eye can refer to a common condition that poses little threat and usually resolves on it’s own. These helpful videos from the American Academy of Ophthalmology can help answer your questions and explain many common eye diseases and treatments.
Subconjunctival Hemorrhage Red EyeA bright red eye with no pain or discharge is probably a subconjunctival hemorrhage. Subconjunctival hemorrhage causes include sneezing, coughing or rubbing the eye, which can cause small vessels on the surface of the eye to bleed. This condition is not dangerous and resolves without treatment. Learn more at http://www.geteyesmart.org.