Recommend these for near-sighted people like me who can't use their mono-focul prescription sunglasses to drive.  I have to wear my progressive lenses to clearly see both distance and the dashboard while driving.

Fit perfect over my glasses and block the bright sun! Was concerned about my peripheral view, but I am able to see movement from underneath the "arm" while I'm looking forward which is sufficient warning for me shift my head and take a quick glance while driving.

I was a little hesitant at getting these at first because wasn't sure how big frames would look on me, but I'm glad I did; hubby says they look "hollywood" on me, LOL.  These are better than the clip-ons I was using, because I can leave them on when I leave car (clip-ons were not attractive). Also saw how clip-ons scratched my hubby's glasses and wanted to avoid that on my prescription glasses.