Three things stood out in Oakley's "high definition" optics... first the thickness of the lenses are corrected incrementally to ensure light enters the eyes at the proper, straight angles. Sounds simple but it's not... and the net effect is noticably less strain at the end of the fishing day. (For comparison's sake, I donned a pair of Maui Jims, which were, for me, almost unwearable). Second, the lenses are made with a hydrophobic coating that keeps water, dust, and oils from affecting them and your vision. I definitely spotted fish well (casting at those fish well was another story). Third, the frames don't pinch or leave divots on my nose, so they rate high for me in wear-comfort. In all, I found them to be a very effective blend of technology and wear-ability that transposes well to any fishing environment.