I purchased these sunglasses primarily for use while playing golf.  They are great.  Lenses are easily changed for different conditions, they feel light and comfortable on my face, and the visibility is perfect.  Very reasonably priced for a three-lens sunglass, comes with very nice case and cleaning cloth/bag. Have worn them for about 10 rounds of golf now and they do improve visibility of the ball, green contours, and ease eye strain.  Couldn't be more pleased.