At the end of the movie Virgil and Amy walk away and Virgil is letting his new guide dog lead him. The guide dog walks straight past the curbside obstacle without hesitation. No working guide dog would have missed this obstacle, it is too inbred during their training. Missing an obstacle of this magnitude would have called for, at the very least, a firm word of caution if not a subtle leash correction. The guide dog would have also stopped to check for traffic as Virgil did not seem to be paying attention.
When the doctors were operating on Virgil's eyes, you see his right eye closed as if he were sleeping normally. If they hadn't already operated on it, it would have been taped shut. If they had operated on it, it would have been covered with gauze which would be taped on his face.