What does 20/100 vision mean?

I just went to the eye doctor today they said i have 20/100 in my right eye and 20/70 in my left eye and i know it's pretty bad and 20/20 is normal i am only 24 yrs old when i was in high school i used to had 20/20 vision when i was like 16 back in 2010 and now i notice i see things blurry or double vision when... show more I just went to the eye doctor today they said i have 20/100 in my right eye and 20/70 in my left eye and i know it's pretty bad and 20/20 is normal i am only 24 yrs old when i was in high school i used to had 20/20 vision when i was like 16 back in 2010 and now i notice i see things blurry or double vision when i move far away i wear prescription glasses and my glasses are strong enough somethings appear blurry even with my glasses on.
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