Please meet a qualified opthalmologist at a good center. Now there are many dedicated eye hospital that can advise you after a formal assessment. A power of + 3 would indicate long sight and -3 woiuld indicate short sight ( things in close range are easy to see, objects in the distance are not very clear).
You have been having glasses for around 8 years, We need to know your age also because, any surgical intervention would give better results once the power is stable (it would be a waste if the surgery is done and your power keeps changing). The cornea in the eyeball is nothing but a lens that controls the amount of light and the focus with which it is passed on to the eye. If there is a problem, then we are given eye glasses, that are like another lens on the outside. Now with advances in laser, the doctors can precise control it in a fashion that they can alter the shape of the cornea so that it is modified to do the job of external eye glasses.
Many people go in for corneal surgery. Basically the laser surgery makes the cornea behave like a contact lens.If you have used a contact lens and have had good results, then you would benefit from the laser eye surgery. Of course there are many criteria that decide whether one is a candidate for this surgery or not. Even if you ar young but have a high intra-ocular pressure, ongoing eye infections, then you may not be suitable for it.This is just an example, so is the age, if your age is ideally around 20 and above you would be a candidate.
Please also remember that in some patients after surgery, when they are in the mid 40's, there may be a need for using reading glasses, additionally.