comfort and performance - the oakley ridge line. oakley's ridge line offers a rugged cylindrical lens for an expanded field of vision in a variety of winter weather conditions. the anti-fog lenses in combination with a particularly comfortable three-layer foam provide moisture transport reliable, all-day wearing comfort.fire iridium lensoakley high definition optics (hdo®) provides true, precise vision with optically correct geometry and clarity. the fire iridium lens is suitable for bright light, sunny and cloudy conditions.transmittance of visible light: 12 %