It can cost anything between 30000/- to 120000/- or more. Depending on technique n clinic you choose. Pain is not these but yes you need to use various eye drops for almost 2 months. Limitations (if any) your attending physician will tell you after having a thorough checkup of your eyes.
Details of your power and the cornea status need to be considered. Most commonly though, patients have prk instead of lasik because the prk procedure requires less corneal tissue thickness than lasik does, which is of significant consideration for patients with naturally thinner corneas or higher amounts of nearsightedness or both.