I went to BKK for a retina fix, they were talking 250,000bht, was given information to get it fixed at the gov Queens hospital in Khon Kaen. Which I did. It entails registering at the hospital to get to see the head eye honcho, a professor, nice bloke, perfect English.
Took all day, but he operated that very night. I had the eye emptied and filled with gas, under local anaesthetic, not nice, but it worked, though had to spend 2 weeks looking at the floor, day and night.
I was in hospital for 4 days, total cost was 66,000bht, a very big cost difference..That was 4 years back....
P.S. He used laser and nitrous oxide to do the repair, he thought one or the other, but had to use both..The N2O was very painful...