Having believed the eyeglass hype, I bought
After action report.
If you are U.S. based, do not bother. This is based upon buying glasses twice at Vision 1000 in one of the shopping centers near Takashimaya on Orchard Road. The prices approximately 5 years and 2 years ago were slightly more than I would pay in Oregon.
It is true that you should have your own prescription from home as the findings done with the automatic machines do not always match what you actually require.
I would suggest either mail order, Costco (if you have one) or one of the national chains found in may U.S. shopping malls.
Things are even higher now in Singapore as the Sing dollar has risen considerably in the past year.