Have utilized a TAKE-A-Look mirror for many years.
Mine mounts on the temple of my eyeglasses and is very adjustable and easy to use.
They last for years; have used 3rd Eye years ago, but the plastic stuff kept breaking and I'd be buying several replacements per year.
TAKE-A-LOOK are handmade in Colorado by disabled folks; no plastic to break or wear out.
The Chuck Harris handmade mirror was also a good choice; unfortunately Chuck died a couple years ago ; he made the mirrors out of recycled stuff including old spokes and bottle caps to hold the glass, etc.
Pedal on!
Rudy/zonatandem