Hi ... If he is young and has minus power, mostly the myopia has a tendency to increase with growing year till 18 / 20 years. Then it becomes stable. If the number is high, you may take some drops prescribed nowdays for controlling it under doctors supervision. Else it is only important to maintain good lifestyle in term of eating , sleeping , less screen time and wearing correct number. When the time is right, you can get laser done to remove  glass number

Ma'am you haven't mentioned about the Spectacle power and age of your Son. Also no information given if the vision is 6/6 after wearing the glasses. There are Refractive surgeries to get rid of Spectacles which are mostly performed after age of around 21 years but has few prerequisites of stable refraction for last 1 year and apt thickness and curvature of cornea. If the age is less than 21 years then the key to maintain normal eye health is regular Spectacles use, healthy nutritious diet, proper working pattern on laptop/ computers and six monthly Eye check ups.