A 34 year old woman visits her physician with a complaint of severe headache for two months. She took several kinds of analgesics with no significant improvement. Her headache is worse in the morning and improved by doing day activities. Imaging studies and laboratory tests confirm the diagnosis of pituitary adenoma.
Which of the following is the most likely effect of this tumor on vision?
A- Homonymous hemianopsia
B- Binasal hemianopsia
C- Bitemporal hemianopsia
D- Superior hemianopsia
Pituitary adenoma compresses the optic chiasm causing bitemporal hemianopsia.
The correct answer is C