I eventually found a modern specialized eye hospital with professional staff in Udon Thani and had lenses in both eyes replaced with EDOF lenses on the same day. Cost for one eye was 35,000 THB plus a fee of close to 5,000 THB for a very thorough eye examination prior to surgery. I can recommend Chaksusathan hospital for excellent service and reasonable prices. Check it out on Facebook: จักษุสถาน อุดร : Chaksusathan Udon.