I’ve bought countless pairs from Zenni for more than a decade and they’ve always been pretty good. Sometimes some frames might feel a little cheap but that seems to have gotten better. For kicks I just bought a pair from EyeBuyDirect and was very pleased. They had them to me in about a week and they are perfect. For the prices, especially for single vision, you could try with very little risk. One thing that I’d note is make sure you get your Pupil Distance measured accurately. I’ve tried at home and was off. Any doc will do it at an exam.