Re: Best fly fishing glasses?
You will find that the yellow will increase contrast and may help you. The are best in cloudy conditions. You need to make sure that 100 percent of UV is blocked. Glass is not a good choice for fishing with weighted flies or split shot. Unless they are built for shooting they won't be impact resistant. To help reduce the glare you need mirrored lens.
Rip Tide makes a very important point. It may be you are looking for the wrong things. No lens is going to make the fish stand out in bold outline. You need to be looking for shadows, moving tails and fins or anything unusually. A group of fish will look different that one or two fish. Next time your friend or a guide can see a fish and you can't, have him help you see what he is seeing. Knowing exactly where a fish is located will help you see it.
Another trick you can try is to tilt your head from side to side slowly to see if you can eliminate more glare. If tilting doesn't make any difference turn your head slowly from side to to side. How the light strikes your lens makes a difference in how well the polarization works. That is why mirrored lens help to reduce some of the glare.