Pituitary tumors affect eye vision mainly because the tumor is compressing the optic cross and/or optic nerve. Generally speaking, patients can recover their vision quickly after surgical decompression, but in some patients, because of the long duration of the disease, the optic nerve is significantly compressed and severely damaged, and the optic nerve and optic papilla are atrophied. Therefore, clinically, once vision loss and visual field defects appear, you need to go to the hospital immediately and do not delay at home. In the clinic, if you find short-term or sudden vision loss and visual field defects, do not casually as myopia or presbyopia, you need to immediately ophthalmology consultation. If the ophthalmology still cannot solve the vision and visual field problems, further improvement of pituitary MRI is needed to consider the possibility that the visual field is impaired due to pituitary tumor.