My mother's eyesight was fine. She just spent half her time away in a far distant part of her head. She did this all her long life. For very substantial spells. I remember being with her for hundreds of hours during my adult life and putting up with her physical presence/mental absence. She never exhibited any anxiety or depression. She just had a strange relationship to life. Particularly life with others. She dealt quite easily with any form of human contact that did NOT involve intimacy. She ran away from intimacy, ran away to someplace in her head where no one could follow her.

So I'd bet that babies really need reactive, reassuring, communicative faces to look at and attach to, whether mothers have vision problems or other more mental problems. Thanks! Take care!