Photochromic performance varies by the amount of light available and temperature. Much progress has been made in Transitions® photochromic dyes to provide more consistent darkening in hot climates and in the shade.
Transitions® Signature® lenses with Chromea7™ technology darken to an average range of 73% to 88% tint depending on conditions including UV levels and temperature.
Transitions® XTRActive® lenses are the darkest Transitions lens especially in high temperatures.
All Transitions lenses automatically adjust their level of darkness as the conditions change. Many patients appreciate the mid-tint on cloudy days or in the shade compared to a sunglass which is too dark or a regular lens that doesn’t darken at all.