My father carried on the eradication process is a tumor in the pituitary gland was pressure on the optic nerve. passed for process three months. but ?

But What?: Your question is not clear, most pituitary tumors are benign. A visual field test should be done and noted for even subtle loss of side vision.

Pituitary tumors are: Most commonly resected. Some are intmately associated with optic mechanism. Your father needs to be followed with visual fields and mri's to discern anatomic and functional changes for good or ill.