I find eyewear to be an absolute essential requirement for cycling. My eyes tear easily, and it's a must to have protection from wind, sun, rain, flying objects etc. It's non negotiable piece of equipment for me. I wont ride without something on my eyes.

For the most part I've been using Oakley's for over 20 years. Blades, M frames, Rader range, A-frame goggles in winter. They are annoyingly expensive but they're designed to work really well. The have a shapes and lens options to fit every face, condition, and sport. They last a long long time with proper care and being that they are so expensive I take extra care of them. You can find deals on them if you arent' in a hurry and know exactly what you are looking for. I know there are plenty of alternatives, and I've had Smiths and Tifosi among others but I have not found any as good in the long term as Oakley.