NIFT PG 2014 Question Paper with solutions

Question : 112 of 150

Marks: +1, -0

A photochromic lens automatically adjusts to the brightness of the sun. Silver particles embedded in the lens material are triggered by UV light to darken when solar radiation increases and lighten when sunlight fades. The result is that your glasses have a much wider range of application into lower light conditions; overcast, fog, morning and early evening. This process adjusts quickly and never wears out. If you go out and use it in a wide variety of light conditions with the same pair of glasses, photochromicity is highly desirable.

For someone who is exposed to different light conditions with the same pair of glasses, photochromic lenses are desirable, as they automatically adjust to the various light conditions.
Be it in the brightness of the sun or in lower light conditions such as overcast, fog, morning and early evening, photochromic glasses are the best bet for your eyes.
Photochromic glasses are essential for healthy eyes as they protect them from UV rays by darkening in bright sunlight.
In order to have a much wide range of application into brighter or lower light conditions, it is essential to use photochromic lenses in your glasses

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