amaurosis /(ăm`a̤*rō"sĭs)/

am·au·ro·sis

amaurosis

n.
  1. A loss or decay of sight as the result of a neurological disease, without any perceptible changes in the eye; -- called also gutta serena, the “drop serene” of Milton. (Med.)

Phrases & Compounds
Amaurosis fugax
Temporary amaurosis