I have a very funny unorthodox theory… I wonder if actually in fact… If you want to focus more in life, taking off your glasses is better? 
Therefore myopia becomes your secret power… Not being distracted by external things.
For example naturally… But I need to focus to lift more than seven times my body weight, and I need like 1,000,000,000,000% supreme focus, taking off my glasses and squeezing my eyes, is a stimulant to focus?