What lobe of the brain is responsible for vision?
The occipital lobe.
The two hemispheres of the brain are each divided into four paired lobes: the frontal, the parietal, the temporal, and the occipital. ( See the diagrammatic representation below.)
Each lobe is responsible for different functions: the frontal for cognitive purposes and voluntary movement; the parietal for interpreting taste, movement, sensation (touch), and taste; the temporal for memories and for integrating these with taste, sensation, sight and touch; the occipital for vision.
A hit to the back of the head, where the occipital lobe is situated can result in blurred vision as one of the possible symptoms.