STEINER BLUHORIZONS BLUHORIZONS with Autobright Technology – this is a sun protection factor for the eyes. Steiner exclusive Autobright Sunlight adaptive lens technology automatically adjusts brightness for the best view in any lighting situation. Whether the sun is just below the horizon, shining brightly directly overhead or bouncing off water or snow at all angles, BLUHORIZONS are engineered to gather the right amount of light and reduce glare for optimum viewing.