Definitions for "Phthisis"
A wasting or consumption of the tissues. The term was formerly applied to many wasting diseases, but is now usually restricted to pulmonary phthisis, or consumption. See Consumption.
involving the lungs with progressive wasting of the body
Consumption.---Chronic wasting away.
Phthisis and Phthisical refers to an eye that has shrunk down due to loss of its fluid. This is an acquired condition that is caused by a disease, trauma or possibly surgery. (Acquired condition would indicate that you had a normal size eye prior to this event.) Also, if the globe is Microphthalmic, it would indicate that it is a congenital problem. It never developed to full size.
Keywords:  ancient, term
An ancient term for TB.