Originally Posted by Magic of tennis
I have to wear sun glasses ALL THE TIME to protect my eyes except very cloudy day, of course.
I use Oakley live strong one.
Livestrong is just an iteration, not a model name.
Originally Posted by adventure
The uv index is the key piece of information you're interested in. Generally speaking, it's advisable to protect yourself from uv rays outdoors between 10 am and 4 pm.
Also, expensive brands of sunglasses don't offer any more or any better protection. What you want are sunglasses with lenses that offer 99% uv protection or better.
Basically all shades with polycarbonate lenses offer "99% uv protection or better".
Optical clarity, absence of distortion and provided contrast are importat for sport.