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 …

Aug 18, 2025 · WebMD explains how photochromic lenses work, their benefits, and the different types. Learn how they protect your eyes and improve vision in various lighting conditions.

Dec 9, 2024 · Photochromic lenses, sometimes referred to as transition lenses, are eyeglass lenses that will turn dark (resembling sunglasses) in sunlight and become clear again when indoors.

Jan 30, 2025 · Photochromic lenses, also known as adaptive or “ transition lenses,” are intelligent lenses designed to protect the eyes from bright light and harmful ultraviolet (UV) rays. They provide a …

Mar 29, 2020 · Once exposed, the molecules in photochromic lenses change structure and move, working to darken, absorb the light and protect your eyes from the sun's damaging rays.

Jul 26, 2025 · Photochromic materials are most widely recognized as eyeglass lenses. These lenses automatically darken when exposed to sunlight, providing sunglass-like protection outdoors, and then …

The meaning of PHOTOCHROMIC is capable of changing color on exposure to radiant energy (such as light). How to use photochromic in a sentence.

Photochromic lenses are eyeglass lenses where photochromic molecules on the lens react to light and change their structure, causing the lens to darken.

The term “photochromism” or “photochromic” is believed to originate from the Greek words φωτόϛ (photos) and χρῶμα (chroma), which mean light and color, respectively. The photochromism can …

Apr 29, 2025 · Photochromic lenses are lenses that stay transparent indoors, but darken when exposed to ultraviolet light from the sun. Essentially, they provide the benefits of glasses and sunglasses in a …