Your son has got high refractive error
in the form of pathological myopia
Myopia is a common refractive error, but high refractive error is usually because of hereditary, developmental and genetic factors.
He can concentrate on studies with correction of his refractive error. Since in children eye ball show rapid development he needs to use glasses regularly and get his eye power check up frequently at 6 months interval. He need to undergo ophthalmoscopy
and examination of the peripheral retina to look for complications associated with high myopia like retinal thinning, retinal holes...
Once he reaches 20 or 21 years he can undergo corrective surgery like lasik, phakic intraocular lens implantation