Don't go to the same optometrist each time and don't let them check the
prescription on your glasses before they check your eyes.

From John Yee:

I had a very depressing experience today.

But let me tell you the good news first. Recently, I checked my vision
against the chart you provided, and I found that I could see the 20/50
line after I was told that my vision was around -3.00 diopters before
I started using Eyezercise (-3.00 D is roughly equivalent to 20/225
acuity).

The bad news...I went back to the same optometrist to get my eyes
checked again, and he told me that my vision was still -3.00 diopters
and that I should forget about trying to improve my vision and that he
doesn't see any evidence that there is any improvement, et cetera.

But I know that my vision had improved to the point where I no longer
drive with my glasses. I can definitely see clearly. I am not
imagining the whole thing!!!

Thanks,"

John William Yee, Professional Author

Canada