My wife Deneen has beautiful blue eyes. They are very sensitive to bright sunlight causing her to squint and get headaches when exposed to a sunny day in the snow. The Inuit made wonderfully crafted visors to protect their eyes from snow blindness on the brilliant tundra and ice pack of the far north. Deneen forgot her sunglasses on a tracking day so created these little shades from hemlock twigs. They proved very effective in cutting the glare, quick to fashion and totally biodegradable. Patent pending.