I worked at an optical for a few years in college and loved it... I loved picking and fitting frames that were perfect for the customer and had a wonderful staff to work with. I still go the optical I used to work at, which is Eclectic Eyewear. If you're into frames and are in the Austin area, I definitely recommend them. They have a very friendly staff and a great selection of frames and they also have good optometrists.
For my last visit, I bought a new pair of glasses and I LoVE them! While working at an optical, I feel in love with two frame companies, ProDesign and Lafont. I have 3 pairs of ProDesign frames (including my new ones and wear all of them) and 0 Lafonts. (Lafonts are on the higher end of frames... one of these days I will own a pair.) Here are my new glasses.
I loved ProDesign so much I even thought about being a sales rep once I graduated... but I don't think I would make a good sales rep. I would definitely recommend ProDesign frames... their quality is good, look fantastic, and have their own trademark look! I can pick out a ProDesign frame any day. :)