I have the clip-on magnifiers for my cap, and they are fine for very overcast days. When it is sunny, I wear a pair of AO/Smith sunglasses with amber lenses. They have +1.5 magnifiers built into them. As I recall, they were expensive, but I would not be without them on the river. It took a couple of hours to get used to them, but they are worth it. Good luck and as always, Best Regards....