myopia is the most common refractive error at your age. at 17 years progression of refractive error or your glass numbers is expected. so do not worry. as your height grows so does the length of eye ball in some cases. please get your glasses remade with comfortable design and redo an eye test with your local ophthalmologist. sometimes a change in the number will cause you a headache. please continue reading. take precautions to read under good illumination to avoid headache. for further information consult an eye care ophthalmologist online --> <link>
how to prevent headache in myopia?