I had a retina detachment - emergency operation at Chiang Mar Ram. Fixed it but side effect was a cataract that developed within a month. Put a new lens in but I could not get new glasses as they put a 20/20 lens in the operated eye. I wear a pretty strong prescription. They said if they made lenses (glasses) for both eye the difference in prescription would mess the brain up and create headaches. They then wanted to operate on the good eye. I declined. Following that it developed another cataract and then a year later the lens came off. Its been floating around in my eye for two years now.
All those adventures cost me 300,000 baht. Tentatively they will operate in April this year and put in a lens that matches my good(but poor vision) eye.

I wouldn't try and talk you out it but it doesn't always go great. Good luck.