John had a brain tumor removed. now he has no vision in his left eye. his tumor was located in his right lobe.

Occipital lobe

Explanation:

The occipital lobe is the part of our brain responsible for visualizing information. It processes images that we observe with our eyes and analyzes that information so we can understand what we see. If they remove a tumor on the right side, the left eye would be the affected one, since, the right side of the brain controls primarily the left side of the body and vice-versa.

answer; neuropathic pain;

answerparathyroid gland;