This therefore results in a huge quantity of information reflected in this axis, causing a bright glare.
At a precise angle (Brewster’s angle), which primarily depends on the surface the light is reflected on, the light is reflected at 100% on the horizontal axis, causing a maximum glare. This happens on the sea or the road when the sun is relatively low in the sky, because an angle of approximately 30° is needed to reach the maximum effect. But this phenomenon is more pronounced in the mountains and can happen at any time of the day, because the surfaces being reflected are abrupt, bearing variable angles.
Standard, unpolarized sunglasses will attenuate the amount of global light that reaches us, but without “targeting” the reflected parasitic rays. Therefore, parasitic light remains an important and significant proportion and continues to mask pertinent information needed by our brain.