Take it you mean cycling glasses. In that case- go quality without getting too much Bling. I used to use, and still do, Rudy Project II's. In fact I realised that I might break the frames sometime so bought a spare pair. So I had two pairs with two different coloured lens.
When I broke one pair of frames- I went to the LBS to enable me to have two pairs still. They no longer make the Project II's so tried many different frames to see what would fit as comfy. Tried Oakleys- Could not afford the ones that felt OK. Went to the cheap ones and they were Cr*p. Finished up with the latest Rudy's again. Unfortunately the spare len's do not fit from the Project II's but they are fantastic glasses. Never steam up- never give me too much wind round the eyes and other than the Sun protection- I never even notice that I am wearing them.
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How long was I in the army? Five foot seven.
Spike Milligan