This optician on Mott Street is FANTASTIC - especially if you're on the VSP plan through your employer, as you get even higher discounts.
I worked with Michael, one of the lead opticians - he is extremely knowledgeable and VERY patient. (I always have to try on about 50 pairs of glasses before I can find one I like, and then spend 10 minutes re-trying my favorites!) Talk about fun - they have a HUGE and great selection of eyeglasses - from conservative, to outlandishly funky. Lots and lots of colors, you will definitely find something you love.
The eyedoctor is a young woman, very professional and thorough, I was hugely impressed!