amaurosis fugax

Amaurosis fugax (Greek amaurosis meaning darkening, dark, or obscure, Latin fugax meaning fleeting) is a painless temporary loss of vision in one or both eyes.

The experience of amaurosis fugax is classically described as a temporary loss of vision in one or both eyes that appears as a 'black curtain coming down vertically into the field of vision in one eye;' however, this altitudinal visual loss is relatively uncommon. In one study, only 23.8 percent of patients with transient monocular vision ...