When it comes to protecting your eyes, choosing a frame shape suited to your activities is as important as getting your sunglasses lenses right.
Today, most sunglasses manufacturers worth their salt ensure that their lenses block out 100% of UVA & UVB radiation, although there are still many cheap sunglasses around that do not even do this job right. But this is only half the story. Light can still enter the eyes from the sides, top and bottom of the lenses. The curvature of the frame in which the lenses are sited plays a further critical role. Put simply, the greater the curvature of the frame, the more unlikely it is that stray UVA and UVB rays will find their way into your eyes.
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