Idiom:

Run before you can walk( be patient )

Hit the book：
Retinal detachment
Macular degeneration
Cataract
Light sensitivity
Blurry
Side effect
Randomly
Respectively
Optical

And high myopia—where the eyeball stretches and becomes too long—isn't just an inconvenience: It raises the raises the risk of other, more serious eye conditions, such as retinal detachment, macular degeneration, premature cataracts and glaucoma. "So what we've been trying to do for many years is to find out if there's any way to reduce the progression of myopia," Tan said.