HMC Photochromic Lens (Transition Grey)
- Anti-reflection
- Photochromic
- Hard multicoating
- 1.56 photogrey lens HMC
- Transition grey
A photochromic lens is an optical lens that darkens on exposure to light of sufficiently high frequency, most commonly ultraviolet (UV) radiation. In the absence of activating light, the lenses return to their clear state.