One question: Why are you getting an eye exam and glasses in Thailand? Are you from there? Because I'm pretty sure Thailand is NOT "in network" for MY vision insurance!
High-end glasses (variable trifocals, Hoya lenses, designer frames) from very high end shop (where a beautiful girl in traditional dress brings you a cold glass of juice and leads you to a chair and the entire shop bows as you leave) cost ~ $200, about 1/4 of what I pay here.
That $500 saved pays for a lot of room nights in Myanmar.