I recently ordered a couple pairs of prescription glasses from Zenni Optical (story here). They arrived today after only a week's wait, and I am beyond pleased with the results.
The styles are cute, the quality is as good as at a "normal" store, the prescription is right, and they came well packaged and protected. I couldn't be happier.
And all this for under $30. Amazing!
~ Call your optometrist to find out your pupillary distance. It's often not listed on the paperwork they give you after your eye exam, but they're required by law to tell you and it's not something that expires like the rest of the prescription.
~ When ordering sunglasses, remember that higher percentages represent darker tints. I ordered 80% grey, and it's very dark. Perfect for the bright sun at the beach, but not something I can see well with inside.
~ Grey tints will give the world a blue cast. Amber tints will improve contrast and amplify greens.
~ Check your current frames to learn the size you need. The numbers inside the arm represent the lens size, bridge, and temple length. You have a little wiggle room (as much as 5mm in temple length), but try to stay close to what you already know looks good.
I have a simple prescription, but my dad has ordered a more complicated pair with bifocals and transition lenses and also had good luck. Hopefully your experience will be as good as ours!
** Zenni has no idea who I am. I just took a chance on some cheap frames, had a good experience, and wanted to share.