I don't really know, but I'm sure you can't if you're young, as your prescription will change. You can do it when you're older with a doctor's OK.BTW, carrots only help you see better in the dark. = =
In my experience, after my surgery my vision was back again to 20/20. I was hesitant to undergo on a lasik surgery at first but a friend of mine who also tried this operation had his vision back to normal so I also went to NNJEI where he had his surgery and gladly it turned out successfully.
Lasik Eye Surgery is a considered as the process for rectifying different eye impairments. It can be done only for the people who are above 18 age and who need to correct the eye vision. Success rate of it much higher with invention of latest technologies.