Wah... really very high.
Diving goggles, frankly, isn't a substitute for your glasses as
they are quite bad. That's based on personal experience.
But no harm trying, maybe you will have better results.
Meanwhile, if there's nothing you can do, just learn to relax your
eyes and be closer to the nature. It helps a lot.
I practise qigong when I'm free, so my eyesight is pretty stable.
