| photochromic glass |
Glass that is manufactured to appear clear until light strikes it. When used in sunglasses, the lens becomes dark and reduces the amount of light transmitted, becoming clear again when no longer exposed to bright light.
출처:
|
|---|---|
| photochromic l. |
a light-sensitive lens that darkens in full light and clears in reduced light.
출처: www.mercksource.com/pp/us/cns/cns_health_library.j...
|