What's considered high/medium/low with nearsightedness? What would -1.1 be considered? Relatively low? Strikingly high? I don't fully understand how the scale works so I figured I'd ask.

Also, how do the prescriptions climb on the chart? Do they go by .1's? (1.1, 1.2, 1.3, 1.4, etc) or something different?

At what point is it unsafe to drive without glasses/contacts? -1.0? -5.0?

And lastly, what would -1.1 equate to in terms of 20/20, 20/40, etc?

There is no -1.1. The powers go in steps of 0.25. So you go: -0.25 to -0.50 to -0.75 to -1.00 and so on. A -1.00 would see in the neighborhood of 20/40.

My gf said her contact box said -1.1. :confused:

Assuming it's -1.0, is it still considered low? What's low/medium/high?

I posted the Snellen chart somewhere recently. Check your other posts.

My gf said her contact box said -1.1. :confused:

Assuming it's -1.0, is it still considered low? What's low/medium/high?

Yes, that would be considered low.

If someone tells you that their prescription changed "one degree" does that mean .25 on the scale? So if they were -1.00 they are now -1.25? At what point does low myopia turn into moderate? 3? 4?