A 75-year-old man has the sudden onset of partial ...
Parietal lobe, left
also, to differentiate whether it is the left or right parietal lobe, recall that stimuli from the left visual field hits the nasal side of the left retina and the temporal side of the right retina, then goes to the right side of the brain. [This figure](https://operativeneurosurgery.com/lib/exe/fetch.php?w=600&tok=856a37&media=optictract.jpg) is helpful.
So you're saying that there's two crosses, making it ipsilateral? @mci