I was riding yesterday afternoon. and I again experienced something that made me very uncomfortable. I was riding north, and the sun was in the western sky (to my left). I was on a country road that was lined with trees. As I rode the tree shadows were so spaced that they created a strobe-light effect with the brilliant sunlight. After a mile or so, it was almost disorienting. Have any of you ever experienced this, and what do you do about it. I was wearing sunglasses, but they didn't help.