The top quality places in Bangkok or only a little cheaper then the west. I had mine done a few years ago at
LASIK | Laser Eye Surgery | Bangkok | Thailand | Asia TRSC, the largest and most famous Lasik center in BKK, by Dr. Ekktet, the founder and perhaps best known Lasik surgeon in Thailand. There are other good places and well, including Bumrungrad I think.
TRSC is in really nice offices and is run first class and efficiently. Not cheap though, my Lasik was about 60-70,000 Baht. A lot depends on the very expensive latest generation machines they use. They give you a choice of machines, and the result with the better machines increases chance of perfect vision.
One warning. Lasik accelerated night vision problems for me, and I have trouble driving at night now and with bright lights at night. Also, it won't fix eventual need for reading glasses by all people.