Intensive HD Sunglasses were introduced by TAG Heuer Eyewear by combining reengineered photochromic darkening ability and "silver flash technology" to produce non-mirrored lenses that become reflective on darkening. These glasses are more suited for outdoor and on-land activities like golf, tennis, hiking, cycling etc.

The key features include

1. the automatic change in brightness level provided by the photochromic lens.
2. excellent perception in minimum light and sunlight protection being provide by the vermillion color that contrasts green and blue
3. more reflective silver flash reduces the amount of light that reach the eyes.