Jason is blindfolded and cannot verbally identify objects in his left hand, which suggest that he has had a dyslexic episode a lateralization of his brain hemispheres an epileptic seizure split-brain surgery

The answer is that he has a split brain surgery because it led him of having to not being able to verbally identify the objects with the use of his left hand when he is blind folded. In which, normally, a person could still identify it even if the person is blind folded with the use of the left hand.