For the best replacement lens, I had both eyes operated on for cataracts at Banphaeo Hospital in Chan Rd Bangkok for 25k each eye. While a very busy Eye And Cataract surgery department that really needs Thai speaking or a Thai with you, it is very organised. First time patients must go in person for an appointment and to register. This compared to Rutnin quote at 17Ok, Pattaya International at 70k per eye and others at higher than my final choice.