Optical 88 is an optometrist in Chinatown that turns around prescriptions in a single day for $80. Just bring the glasses you want to fill and your prescription and they will treat you like a queen. I think they'll also check your prescription for free but I'm not sure because I already had mine, that's just what the girls at Fabulous Fanny's told me. That's where I bought my frames btw—if you want to make a real day of it, start there, pick out some frames, then walk 10 minutes to Optical 88 and you'll be set in 24 hours.