Round minimalist metal frames are still in trend - despite being around for some time.
Perhaps it has go to do with the neutral round shape that fits many faces, paired with a thin metal frame that is lightweight and does not distract from one's overall facial features.
It is not too serious, yet not overly casual for work.
It just fits, nicely.
Off-round shapes like heptagonal (that's seven sides!) offer a special variant to the typical smooth round shape. We even have one that is three-sided at the top and a smooth curve below.