Chemosis is the swelling (or edema) of the conjunctiva. In general, chemosis is a nonspecific sign of eye irritation. The outer surface covering appears to have fluid in it. Often, the eye area swells so much that the eyes become difficult or impossible to close fully.[1] It is usually caused by allergies or viral infections, as well as eye rubbing. Chemosis is also included in the Chandler Classification system of orbital infections.
Other causes of chemosis include:
Treatment depends on the cause of the chemosis.