Impact of proton beam radiation therapy on conduction of visual information as assessed by visual evoked potentials in patients with brain or head and neck tumors: A bicentric prospective study.

The median age was 63.1 years, with female predominance (63.1%).

Tumors included meningiomas (43.7%, n=31), pituitary adenomas (19.7%, n=14), and nasal sinus or cutaneous carcinomas (12.7%, n=9).

Abnormal visual evoked potentials values were observed in 78% of patients prior to radiation therapy.

Amplitudes showed a non-significant downward trend, peaking at 18 months.