Interesting I always thought people with dogs were as you say Stevie wonder blind.
Not necessarily, though as with everything, there are certain critera that have to be shown to be shown to be disabled due to vision impairment. It isn't exactly all or nothing there.
Some history for you on my wife; and for everyone else here who thinks that this is just a farce, consider yourself educated so your opinions can go pound sand.
My wife had a diaphragmatic hernia when she was born. While they were able to fix that, normal procedure when children are born is to sterilize their eyes, normally with something like silver nitrate. The doctor in this case ordered a cautery stick of silver nitrate to be applied to my wife's eyes. The student under him questioned it, which she was abruptly told to not question him. She applied the stick to her eyes, which fried her cornea and retina in one eye, and severely damaged the optic nerve from that eye leading back to her brain. glaucoma set in on the other eye, leaving my wife nearly totally blind.
Long story short, malpractice suit follows, followed by 7 cornea transplants, which one barely took, leaving her with very little eyesight at all in the eye that didn't have glaucoma.
Those 7 transplants all happened before she was 12 years old, and that's the little eyesight she has right now. It wasn't until she was 18 when she was able to look into guide dogs, in which she immediately qualified for it. By contrast, what happened with Stevie Wonder was that his retinas never formed during his gestational period, so he never had any eyesight to begin with.
On the bright side of this, her situation actually became required reading material for all optometrists and opthamologists.
BL.