The difference between your contact lens and spectacle power is because of vertex distance.(distance between cornea and your back surface of glasses)
Theoretically it is 12-13 mm or depends on individual,may be upto 20 mm
So when calculating for LASIK we consider true refractory vertex distance and modify accordingly by using munnerlyn formula
Not going into details of how we calculate
But all LASIK surgeons have idea about this
Dont worry it will be taken care...
Since you have high power we need to see your cornea thickness prior....
If thin we can go with other procedure SMILE, phakic intraocular lens, refractive lens exchange
Answered2020-05-17 01:05:22
Let others know if this answer was helpful