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Contact lens senses UV light to tell you when it’s time for sunscreen


Scientist

Contact lens senses UV light to tell you when it’s time for sunscreen

Health 4 February 2020 By Donna Lu Time for sunscreen?Cavan Images/GettyOur skin needs to get a certain amount of ultraviolet light to produce vitamin D, but how do we know when we have had too much sun? Wearables that change colour when exposed to UV light could tell us when we should put on sunscreen…

Contact lens senses UV light to tell you when it’s time for sunscreen


Health



4 February 2020

By Donna Lu

man with surfboard

Time for sunscreen?

Cavan Images/Getty

Our skin needs to get a certain amount of ultraviolet light to produce vitamin D, but how do we know when we have had too much sun? Wearables that change colour when exposed to UV light could tell us when we should put on sunscreen or seek shade.

Ali Yetisen at the Technical University of Munich in Germany and his colleagues created the wearables using liquid dyes that are sensitive to two types of UV radiation.

They used several different dyes that change colour when exposed to UVA and UVB; colour transitions included from yellow …

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