What is quadrantanopsia?

Quadrantanopsia is blindness in approximately a quarter of the visual field.
crossed binasal q. Blindness of the lower nasal quarter of the visual field of one eye
and the upper nasal of the other eye.
crossed temporal q. Blindness of the lower temporal quarter of the visual field of one eye and the upper temporal of the other eye.
lower heteronymous q. Blindness of either both lower nasal or both lower temporal
quarters of the visual fields.
upper heteronymous q. Blindness of both upper nasal or both upper temporal quarters of the nasal fields.

See also:

Alphabetical List of Terms: