hello i think you can go for PRK or bladefree lasik

Lasik is done only after myopic power is stabilised.you are only 19 yrs old & myopic power increases upto20-21 in male, usually lasik  done only once in life time so wait till 21 yrs,then you go lasik operation. 490nm corneal thickness is sufficient for 2.5 D.1D myopic  correction reduces corneal thickness around 35nm in lasik operation, so with 2.5D corneal thickness  will reduce by 90-95nm& your corneal thickness will still remain around 400nm which is quite safe ,but lasik operated emmetropic is not allowed in Rly,Air Force& Army's job.

You can only go for PRK that is surface laser after careful eye testing.

Hello there...... Your results depend on your specific refractive error and other factors. People with a low grade of nearsightedness tend to have the most success with refractive surgery. People with a high degree of nearsightedness or farsightedness along with astigmatism have less predictable results. Many people have positive results and report high satisfaction after LASIK surgery.... Consult Ophthalmologist......