Personally, I think it is very effective and necessary. I have myopia and really love sports. But wearing ordinary glasses is very uncomfortable when I do intense campaign, and the ordinary glasses fall to the ground easily after sweating. Bad luck, your lonely glasses can be stepped on broken by somebody else. And there are more dangerous situations. Once I played basketball wearing regular glasses, the result is that somebody broke it on my face, and the broken glasses stabbed on my eyelid, fortunately not my eyeballs. Then I began to wear prescription sports glasses. It is very comfortable to wear prescription sports glasses. Compared with the ordinary glasses, its durability is much better, and it can reduce the damage that strong light gives when you do sports outdoor. Prescription sports glasses can be bought in a lot of places. For example, I have bought my prescription sports glasses at http://www.sportsprescriptionglasses.co.uk/, and the price is not expensive.