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what eye prescription is considered blind?

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What eye prescription would be classified as "legally blind"?
I don't understand what 20/70 or 20/200 even means. All I know is that my prescription for my left eye is 6.50 and my right eye is 7.00 and someone told me that means that I'm legally blind. Is that true? And what is the prescription number to be classified as legally blind?
Update: I know all of that, I've read wikipedia and I've searched the internet. I just want to know if my prescription means that I'm legally blind.

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asked Feb 12 in Health by smyadmin

10 Answers

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No--6.50 and 7.00 are rather high numbers, but if your glasses/contacts can correct you so that you can see 20/100 or better, you are not legally blind. Therefore, there isn't a dividing mark in terms of what makes you legally blind or not.

Granted, if glasses didn't exist, you certainly would be legally blind--estimated 2.00-2.50 diopters of nearsightedness (and farsightedness as well, although sometimes they can compensate at distances, so they might have to have a higher prescription than that) is enough to make you see only 20/200. I cannot see 20/200 without my glasses with my -3.25 prescription, and that's still a lot smaller in magnitude than your 6.50 or 7.00.
answered Feb 12 by Hufflepuff
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20/70 means that what "normal" eyes can see at 70 feet, you have to be 20 feet away to see it the way they do. I believe it's around 20/150 that you are considered legally blind. Of course that's without corrective lenses. I'm pretty sure by now I'm legally blind without my contacts or glasses.

Your prescription is different. It has a lot more information in it so you can ask your optometrist sometime to explain to you what each number stands for.
answered Feb 12 by ixi26c

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