How effective is the laser treatment for short sight?

Hi friends, this is priya here again. I am 24 years old. i am having short sight with 4.5 point.10 years ago my doctor had told me that there is a laser treatment for short sight which can cure th problem but this treatment can be done only after 18 years of my age.Now i would like to know how effective is this treatment? Is it safe to go for this treatment? what are the risk factors attached with this?what are the results of this treatment in India? I really don't no what to do I am totaly confused . Please suggest me if u have any solution to this.
LASIK is a surgical procedure that can reduce a person's dependency on glasses or contact lenses. The procedure permanently changes the shape of the cornea (the delicate clear covering on the front of the eye). For clear vision, the eye's cornea and lens must bend (refract) light rays properly, so that images are focused on the retina. If the light rays aren't clearly focused on the retina, the images you see are blurry.
This blurriness is referred to as a "refractive error." It is caused by an imperfectly shaped eyeball, cornea, or lens. LASIK uses an Excimer Laser (an ultraviolet laser) to precisely remove corneal tissue to correct the shape for better focusing.
LASIK eye surgery is performed most often on people who have nearsightedness (myopia), which means that they only clearly see nearby objects; anything far away is blurry.