My father is 80 years old. He had cataract surgery recently. The doctors thought he had an infection as a result of the surgery. However, he went to specialist who treated him for an infection that did not exist. Since the surgery he has been off balance and been to several doctors. The doctors have checked his heart (no problem there), checked for cancer (no problem there), checked his blood (no problem there), it has to be the eye surgery... He is off balance and cannot walk straight up anymore... All symptoms seem to have happened after the eye surgery? Can you help me?