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...

Internuclear Ophthalmoplegia

Internuclear ophthalmoplegia, or INO ophthalmoplegia, is an eye movement disorder. The primary internuclear ophthalmoplegia symptom is the inability to look to one side of your face with both of your eyes at the same time. This disorder can be present in one or both...