Driving Permit Question?

My question is about the eye test. I'm definitely nearsighted, but not to the point where everything is dead past 5 feet. I can see fine without gles when I'm riding in a car, so I wouldn't want to get that restriction for gles slapped on my permit. Does anyone know what I can base the eye test off of? I'm not sure what exactly my vision is, so I would like to just be sure at home before I take the test. If I put a bunch of letters on a piece of paper (you name what size the letters would be), how far away would I have to be to p the permit eye exam?