While we are out and about we have to always remember to maintain sun protection. Now while driving or riding this can mainly takes the form of sun glasses.
And especially while moving quickly the value of good sun glasses is not to be underestimated. Good sunglasses have anti-glare coatings that let you see past the reflection of light on water or other surfaces.
This of course has two benefits while on the road instead of being blinded you are also able to read or see past the surface that would normally blind you.
Also higher end sun glasses are more reliable as to the UV protection rating which can easily be skewed and has often be cast in doubt by consumer protection groups.
Remember sunglasses are not protecting your eyes with shade but with a specific coating that is made to reduce the harmful UV rays that damage our eyes. In eyes the UV rays cause cataracts which can in their most severe form cause blindness. So wearing sunglasses when in high brightness settings such as skiing, sailing, or any outdoor summer activity should prompt you to wear sunglasses.
Now the cheap sunglasses will reduce UV rays as well but they wont do so as reliably as the more expensive ones. As always in those cases you do get what you pay for. So if you are unwilling to buy the better sunglasses you will get less protection but it is still better then no protection at all.
Beware of scratches though, there is very little in terms of wear and tear information on sunglasses however they are made UV shielding by a anti-UV coating so if they get scratched I would suspect that the UV protection has to eventually suffer from that.
We use Ray Bands and Maui Jims both make excellent sunglasses and there are many other good companies out there. But if there is one thing not cheap out on its health. After all you only got one body.
Don't forget to wear your SPF 30 or higher when the UV rating is above 6 as well as your sunglasses.
Please follow the UVI advisement which was established by the WHO.
All weather services do report your local UV rating which you should use as guide.