The areas of the brain that lead to vision loss if they receive damaged due to a stroke are the occipital lobe, the temporal lobe and parietal lobe, according to Johns Hopkins Medicine. The occipital lobe allows a person to see, but the parietal and temporal lobes allow people to recognize and understand what they are seeing.
When a stroke affects the occipital lobe, the visual symptoms range from hallucinations to varying amounts of vision loss, including complete blindness, says About.com. Homonomous hemianopia is an inability to see objects on the opposite side of where the stroke occurred. If the stroke affects the occipital pole, the patient sees a black hole in the center of his visual field.
If the stroke damages both sides of the occipital lobe, the patient experiences cortical blindness, claims About.com. The patient cannot see but sometimes experiences a phenomenon called anosagnosia. This means that the patient is incapable of believing he is blind.
When a patient has a stroke in his parietal lobe, he finds it difficult to navigate places, even if they are familiar to him, according to University Hospital, Newark, New Jersey. People who suffer a temporal lobe stroke are blind in a quarter of their visual field or delusionally misidentify what they are viewing, claims the National Center for Biotechnology Information.