Do you have the Bangkok Airways resident card?
BHS should give a discount if you do.
I had my cataracts replaced 18 months ago but I went to BHP in Phuket. At the Bright View Centre.
Tri focal lenses - no more glasses.
Absolutely brilliant. Cost me about 230,000 THB plus flights etc.
If BHS are providing the same service, maybe go there. Always ask for a discount. (I self insure and get discounts.)
https://www.brightviewcenter.com/