I was doing some work on my site and came across this little tip in my free to read trout fishing book ‘Fishing Smarter for Trout’ in the chapter on spotting trout.
I was guiding an American client who was a very accomplished angler. We had a successful morning spotting and then fishing to spotted fish. Over the morning I noticed that every time we took a break for one reason or another, he would face away from the direction of the sun and remove his sunglasses for several minutes. In fact I also began to notice that often when we approached a possible lie he would take off his glasses for a few moments and put them back on as we began to search for a fish.
I questioned him about this and he theorised that over time our eyes adjust to take account of the different light characteristics reaching them, because of the sunglasses. He believed that by removing sunglasses regularly, the heightened ability to detect contrast when you first put on Polaroid’s was re-stimulated.
Now, I do not know if there is any scientific basis for his theory, but I tried it. It worked, and still works for me.