what is the difference between total and legal blindness?!

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Just to clarify what Howard said, to be legally blind, your vision WITH CORRECTION must be worse than 20/200 in the better eye. It doesn't matter how bad your uncorrected vision is: even if your glasses were an inch thick, as long as you could see better than 20/200 when wearing them, you would NOT be legally blind.

Legally blind is 20/200 vision or your field of vision is a 20 degree cone. 20/200 means you can still see and read things if the letters are big enough. The 200 means you must be 20 feet away to see something that people with normal vision can see from 200 feet.

The 20 degree field of view mean you might be able to see things as clearly as someone with normal vision but you can only see things directly where you're looking. It's as if you were looking down a tube or perhaps were approaching the exit of a tunnel. You could only see things in a small circle in front of you.

Totally blind means you can't distinguish anything other than shadows. If someone waved there hand in front of your face you might see a dark shadow move across your field of view. If could also be you see nothing but blackness.

Legal blindness can also be corrected with contacts or glasses, depending on the severity. I can only see clearly maybe three inches in front of my face without them. I would be considered legally blind, but have 20/20 vision with corrective lenses.

Legal you can still see lights and forms. total means its all black