Changeable and Photo-chromatic Lenses: B&L Ray-Ban Changeable's sunglasses incorporate unique B&L photo-chromatic lenses that react to the sun's brightness protecting your eyes in all lighting conditions. Regular Ray-Ban Changeable's sunglasses darken to compensate for varying outdoor light conditions. This change in lens density which results in the lightening and darkening is a lifetime feature and will not disappear or weaken over time. Ray-Ban Changeable's sunglasses darken to 75% of their full capacity within the first minutes of exposure to sunlight. In shade, they lighten to half way within the first 10 minutes and to about 75% within the first 90 minutes. Following the sale of the Ray- Ban brand to Luxottica in 1999, Bausch & Lomb ceased making Changeable's lenses for Ray-Ban sunglasses, and they ceased to be offered in their original form.
Ultragradient: These lenses have been filmed with a metallic coating to obtain a vertical density gradation, which can be a mirrored coating from both outside and inside. They also react to the sun's brightness, darkening/lightening accordingly.
Mirrored: A metallic coating applied to the lenses of these fine Ray-Ban sunglasses creates the popular mirrored look, adding extra protection for strong glare conditions.
RB-3: Ray-Ban RB-3 green lenses feature absorption balanced with the eye's sensitivity to colours for peak acuity, with 71% visible light absorption and 100% UV protection.
B-15: Ray-Ban B-15 high contrast brown lenses screen out blue light to improve contrast and sharpen details, providing 85% visible light absorption and 100% UV protection.
G-15: Ray-Ban G-15 neutral grey lenses transmit all colours equally, retaining their true values, while providing 85% visible light absorption and 100% UV protection.
Ambermatic: B&L Ray-Ban Ambermatic lenses have photo-chromatic properties that change density depending on the degree of both brightness and temperature. Taking its name from the color of the lens, Ray-Ban Ambermatic sunglasses change from amber yellow to grey, becoming darker and denser in both bright light conditions and colder temperatures. This is exactly what you would want and expect in bright sunlight (or at a ski resort), when glare, reflected off the snow can become a real problem. The Ray-Ban brand was purchased from B&L by the Italian conglomerate Luxottica in 1999, after which no more B&L Ray-Ban Ambermatic sunglasses or shooters were produced.