I was thinking is obitos eyesight bad or near blindness. Bcus he uses his mangekyo sharingan a lot and he shows no sign of blindness. So im wondering if its only fom ametaseru tskyomi and susano'o that causes the eyesight to fade.
He could very well be blind in the eye he's
got a mangekyou sharingan in, while using the
other eye for sight only. Especially now with the
Rinnegan his visual must be excellent even for
only having 1 eye with vision.