Yes, this is all true, but if you put a dark one over a lighter iris, e.g. my medium gray tint over yellowish brown irises, it definitely made the eyes look darker. In movies they sometimes used opaque lenses with a little hole for the pupil to lighten eyes--must have been torture to wear, plus tricky to fit so they wouldn't slip and give it away. I wore the tinted ones to cut the light, like sunglasses. Blue eyes would look brown under an orange tint, which would also cut a lot of UV. The question was, were Hillary's eyes brown or blue? Or perhaps a forgettable shade of hazel, which would have been easy to turn brown, but not blue.
Yes, this is all true, but if you put a dark one over a lighter iris, e.g. my medium gray tint over yellowish brown irises, it definitely made the eyes look darker. In movies they sometimes used opaque lenses with a little hole for the pupil to lighten eyes--must have been torture to wear, plus tricky to fit so they wouldn't slip and give it away. I wore the tinted ones to cut the light, like sunglasses. Blue eyes would look brown under an orange tint, which would also cut a lot of UV. The question was, were Hillary's eyes brown or blue? Or perhaps a forgettable shade of hazel, which would have been easy to turn brown, but not blue.