Proptosis. It is a forward displacement (ie bulging) of one eye. There are many causes. I recommend having it evaluating by an ophthalmologist.
Bulging of the eyes. Proptosis is a condition in which the eyes bulge out. It can be caused by a number of conditions, including grave's disease. It it is one sided, it may indicate a mass behind the eye. If this is a new finding, it warrants careful evaluation by your physician.
Lots of things. There are a variety of ways to think about this but the easiest is from an anatomical view. Basically anything that pushes the eye forward in the orbit can cause proptosis. This could include infection, mass/tumor, bleeding, enlarged eye muscles, trauma to surrounding tissue, inflammation, etc. Also certain eyelid problems could cause the eye to appear more proptotic. Read more...