In the Hospital Wing at Hogwarts, Harry, Hermione, and the other two were discussing wizards' eyesight.
"Wizards don't seem to get short-sighted very often. Look at all the professors at school. They must have read loads of books, but none of them wear glasses except Dumbledore," Harry said.
"Professor McGonagall wears glasses too," Ron corrected him.
"Professor McGonagall isn't short-sighted. Her eyesight is actually very good." Hermione shook her head and said:
"I often go to her office after class to ask questions. She never seems to wear glasses outside lessons, and she has no trouble at all reading books or newspapers."
At Hermione's words, Harry and the others recalled that Professor McGonagall indeed hadn't worn glasses on the few occasions they had gone to see her outside class. And now that they thought about it...
"Now that you mention it, Hermione, Dumbledore didn't seem to be wearing glasses that time we went to his office either," Neville said, recalling the visit.
Harry remembered that too. He still remembered Dumbledore's sharp, penetrating gaze that day. He quickly nodded. "Yes, I remember now. Dumbledore wasn't wearing glasses that time either."
"By the sound of it, wizards all seem to have fairly good eyesight," Hermione said as she thought back.
She was thinking of herself.
Since coming to Hogwarts, she had read an enormous amount to make up the gap between herself and the children from wizarding families, often reading late into the night by lamplight. Yet even so, her eyesight hadn't deteriorated much.
"Well, I really can't think of anyone else who wears glasses off the top of my head." Ron spread his hands.
"I do know one other person." Harry scratched his head. "My dad! There are pictures of him in that photo album Hagrid gave me, and he's wearing