A normal optic nerve is made up of more than 1 million tiny nerve fibers. With
glaucoma
as the optic nerve is damaged it loses nerve fibers. As a result the appearance of the optic nerve changes. We refer to this
as "cupping". As the "cupping" increases blind spots begin to develop in your field of vision.
Ophthalmologist use a technique called a visual field test to look for these blind spots. The results of this test show us if
and where the blind spots are appearing in your field of vision. Spots you may not even notice.