Funny, are you from 3rd world country?
Here in The Netherlands they don't do 'tests' with your eyes and follow a light. You just have to blow in some machine, and the machine calculates how much alcohol you have used.
My eyes for example get very red and 'tired' when there is a lot of smoke in the area(bars for example) I would fail for every eye test when I come out of it
(and no I don't drink when I need to drive, think it's stupid)