Sorry fella, the shade from the brim makes my pupil size slightly increase, reacting to optimize to the changed condition as you say. under a shaded canopy of vegetation it does help you see better. Of course the pupil adjust in different lighting conditions. Works for hunting humans and game animals. It really helps pick up movement better.
Yes, it does help shade light from your eyes in direct sunlight but that ain’t what I use it for.
Now lets talk about how the Boonie hat enhances hearing eventhough it hinders direction
Shortened M79’s with red dots and altered boonie hats are my thang.
Anyway, the 2.5x works but it ain’t for everyone
The first paragraph is circles. Your boonie hat is good for blocking the sun and helping with rain. Movement is picked up by the peripheral vision. You see sharp with the central. Visually you are way out there. Visually any hat with a brim will do what a bonnie hat does, and most of us during hunting are wearing a hat.
Perhaps it can help funnel sounds to the ears. I'll take your word on that.
