Who introduced the first successful plastic photochromic lenses and when?

• A. Transitions in 1990
• B. Transitions in 1991
• C. Transitions in 1992
• D. Transitions in 1989

Answer: (B)

The introduction of the first successful plastic photochromic lenses occurred in 1991 by Transitions. This innovation represented a significant advancement in the eyewear industry, as it marked the development of lenses that could adapt to changing light conditions, providing convenience and protection for wearers. These lenses have the ability to darken in response to sunlight while becoming clear indoors, which enhances visual comfort and reduces glare.

The timing in 1991 is crucial because it reflects the culmination of research and development efforts aimed at combining photochromic technology with lightweight plastic materials. This made the lenses more accessible and practical for everyday use, leading to widespread adoption among consumers. The introduction of these lenses helped to set a new standard in eyewear, influencing the market and paving the way for further innovations in lens technology.