Im 25 yr old have -8 & -9 pwr in right and left eye. can i go for lasik?

Possibly: Higher degrees of nearsightedness are at higher risk for problems, but if your corneas are thick enough, surgery may be possible. You may want to consider alternatives such as icl (implantable contact lens) surgery. More info: http://www2020vision.Com.

Perhaps : This really depends on the thickness of your corneas which you doctor can check. If too thin for lasik, prk or icl surgery may be the way to go.