I had both eyes done at Rutnin Eye Hospital, one month apart, for 50,000 per eye, covered by insurance, about 10 years ago and the difference was astounding. From extremely short-sighted to able to drive without glasses made me feel freer than I had ever felt. The mother-in-law went yesterday and the quote was 55,000 Baht for just the one eye. The place is frequented by wealthy people so no reason not to.
Highly recommended.