What is a Pupil?

The pupil is the opening or hole in the center of the iris (the structure that gives our eyes their color). The function of the pupil is to allow light to enter the eye so it can be focused on the retina to begin the process of sight. Typically, the pupils appear...

Amaurosis fugax

Amaurosis fugax is a temporary loss of vision in one or both eyes due to a lack of blood flow to the retina. The retina is the light-sensitive layer of tissue at the back of the eyeball.   Causes Amaurosis fugax is not itself a disease. Instead, it is a sign of...