From: siege	Date: December 8th, 2012 02:54 pm (UTC)		(Link)
	Ability compensation

Continuing on from your discussion there, I have a friend going blind from diabetic complications; but she's a very competent natural magician with "witch" blood in her genes, and she uses her third eye to see when she really needs to. She describes it as "seeing in neon" since the colors she perceives are spirit-aura-based, rather than light-reflective. Last I heard, she was regularly mowing her parents' lawn using that aid.