I'm Korean, and here, when we talk about eyesight, we say "My left eye is 1.5 and right eye is 1.0. The smaller the number is, the worse the eye is. Ex) 2.0 - perfect / 0.1 - too bad. need glasses.
And I wonder how to say 1.2 in English way. I googled and it shows that 20/20 means 1.0. However, what I'd like to know is 1.2 in English way.
Sorry about my broken English. It's my best though.