You think saku would know whether sasu wears glasses or not since you’d need to have reliable vision in a shinobi fight in order to survive the outcome. Karin is a prime example here. In both the FoD and in the fight against Kaguya sasu didn’t need to wear any assistive devices.
It’s really not a matter of, oh I don’t see him very often, so Idk. You saw him in fights. You even fought him yourself. If there is anytime to wear glasses if you need them, its when the difference between life and death depends on being able to see your enemy. In the times that you were there with him, in those critical moments, was he wearing glasses?
If not, then did he need them?
If not, then would he wear them???
Rly Saku, why couldn’t you just be honest with your kid like a decent parent? Are you really so doubtful of your kid’s own competence that you insist on sheltering her?
Another thing to think about, in the land of iron, the only reason sasu didn’t smite his teammates was because his vision was blurry as hell, making it impossible to land and dodge attacks. He was under the full CoH too, so he wasn’t pulling punches. If Obito handed him some glasses that somehow greatly improved his vision at that time, do you team 7 would be alive?