Stupid Question From A Stupid Person

In fourth grade we had a motivational speaker come in and talk to us who was completely blind since birth. At the end they had time for questions and a girl asked why they didn't just wear super thick glasses. When the person replied that they cannot see ANYTHING, so there would be nothing to magnify, the girl said "No like SUPER thick glasses." We were only in fourth grade but we all were looking at her like how do you not get this. The blind dude just shook his head.