How Do Sunglasses Block UV Rays? The color and degree of darkness provided by sunglasses have nothing to do with how well they block dangerous UV rays. Lenses are treated with a clear coating that blocks UV rays, and even standard prescription eyeglasses with no tinting use lenses that have been coated to block UV.
verb (used with object) 1. to overstrain or wrench (the ligaments of an ankle, wrist, or other joint) so as to injure without fracture or dislocation. noun. 2. a violent straining or wrenching of the parts around a joint, without dislocation. 3. the condition of being sprained. Origin of sprain.
Oversupination is a more severe version of this part of the gait cycle, and is one of the more common causes of a sprained ankle. Oversupination often suggests poor or limited shock absorption. The movements of supination are broken down like this: Inversion: turning the sole inwards.