"M-Mhm-"
He was still blinking a lot
"Nnn-"
"O-Oh! Um I just-kinda-have a hard time seeing super well...I should probably get glasses but..."
"Pft-y-yeah-"
"Oh-I uh...haven't gotten around to it I guess-"
In reality there wasn't really a point-he was steadily going blind. (He has Cruetzfeldt-Jakob syndrome by the way-he's still in the earlier stages)
His movements were a bit stiff, and the books slipped out of his hands-but he very quickly-almost jerkily-picked them up