[@TheFinite](/forums/rp/topics/welcome-to-equestria?post_id=5244273#post_5244273)
[@Revan0123](/forums/rp/topics/welcome-to-equestria?post_id=5244265#post_5244265)
(IIRC, a while back, one of Cerebrate's characters established that this woEquestrldia is a little different from the main FIM world. It's not entirely out of the ordinary that some other variants were there too like Changelings in this particular universe CAN go blind at birth, etc)