Photochromic lenses were introduced by ______ in ______.

Photochromic lenses, which are also referred to as transition lenses, were introduced by Corning in 1964. The development of these lenses allowed for a significant advancement in eyewear technology. Corning's innovation enabled the lenses to darken in response to ultraviolet light exposure and return to a clear state when indoors, providing comfort and protection for the eyes in varying light conditions.

This advancement was pivotal in the eyewear industry due to its practicality and user benefits, making it easier for wearers to transition from indoor to outdoor environments without needing to switch glasses. Such innovations meet the increasing demand for comfort and convenience in eyewear. The introduction by Corning notably marked the beginning of a new category of lenses in the market and has influenced lens technology significantly since then.