I’ve been a dispensing optician since 1988. I might have something to offer.
I heartily agree with those who tell you to take with you someone whose opinion you trust. If you wear contact lenses, have them in your eyes while trying on frames. Don’t be afraid to show up a little early to look at frames before you see the doctor. If your eyes are dilated, it will be very hard to choose new frames. If you are dilated, don’t pick out frames you can’t see. Come back tomorrow. I offer that option to every single patient who says “I can’t see right”.
As far as “what looks good on me”, you want to go with a shape that will sort of contrast your face shape. Square jawline? NO to square/rectangle frames? Nice round babyface? Round frames will only make you look rounder. I often have to illustrate that to people by putting on a really round frame myself, and showing them how it instantly makes me look about 40 pounds heavier. Don’t be afraid of the optician. It is his/her job to make you a good, functioning, pair of glasses that you’ll be glad to wear. I’d honestly rather you walk out of my office and go elsewhere, than have you buy something that you’re not going to love. For color, consider how well they suit your wardrobe as well as your complexion. If you’re only going to have one pair, it should be fairly neutral. Avoid really shiny frames. They just look weird. Don’t buy gold-ish if all your jewelry is silver. Try on a color you might be afraid of, just because you never know. I have a gorgeous olive green frame in the office, and it’s meant for men. I just can’t get the men around here to try it on. I’m sure we’ll be sending it back.
If you tend to keep your glasses a really long time, don’t get anything “trendy”. Right now, crystal accents are trendy, but they may be way out of style in 6 months. You can get nice, fashionable frames without being a fashion victim. Also, don’t be afraid to ask to see something less expensive if you’re looking for that. Where I work, frames start at $70 and go as high as $280. I can find one at both ends of that range for just about every patient. It really depends on what you want. Some of my patients want glasses that function, and don’t care about fashion. Other patients want their glasses to be “jewelry”, and that’s how I want my glasses to be.
We are starting to see a slow shift toward larger frames for women. That’s a welcome change to anyone over 30. I can wear anything larger than a 49 eyesize. Your needs will be different.
Also, if you see something you like, but you’re not certain about it, ask the optician to write the frame style down for you, and go back in a few days. Try it on again, to make sure you didn’t just get excited about something. I’ve actually ordered frames for myself, and then when my lenses were mounted, I felt very ambivalent about them.
Good luck, and let me know if you need more help.