Hi!
I'm facing the same problem too. I can't see the double line when I wear my glass, and I can't see the 4 corner of the book if I removed my glass to see the double line. (I need to close my eye to the book so the text won't blur)
But some senior told me it is ok if didn't or can't see the double line, just used the imaginary X technique. I try so and I still on my way to success. Wish you all the best and good luck.
Edgard Tan
