I live in Chiang Mai. About 9 years ago, I had my left cataract operated on at Suang Doc hospital on the Suthep Road.
Two years later, the right eye was done.
Both operations were highly successful, painless and at 70 years old my eyesight was almost as good as it had been when I was a younger man.
Both operations were carried out by the same lady and I was , (and still am), immensely grateful and my eyes are still good at 79. Each operation only took about an hour or so, and the recovery process included an eye patch for a while and eyedrops - sunglasses recommended.
Each operation cost me 40,000 Baht. 9 years ago. I'm sure the cost has increased, but nothing like the costs the Op has quoted from his source.
Even if you increase the cost to double - it is still inexpensive.
The General Practitioner, (GP), in the Loi Kroh Road surgery, my doctor for the past 30 years, recommended this lady. He told me she had operated on his own mother.
It is worth checking out