Definition for Exophthalmos
From Biology Forums Dictionary
Exophthalmos, or exophthalmia, is a protruding eyeball anteriorly out of the orbit (eye socket). The Greek word ophthalmos means "eye" and the Greek word ex means "out". Exophthalmos can be either bilateral (both eyes bulge out) or unilateral (just one eye bulges out). Doctors use an exophthalmometer to measure the degree of exophthalmos.