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Looking at a deep red light for a few minutes every morning can help improve your sight, especially if it’s starting to fail.
The exercise can improve the eye’s colour contrast by as much as 20 percent, and the improvement can last for up to week after just one session, say researchers from University College London.
It helps support the retina, which ages faster than any other organ in the body and starts to lose its photoreceptor abilities by the time we reach 40.
But looking into a long wavelength (670 nanometres) red light for three minutes every day when we first wake up can slow the ageing process right down. It’s important to do the exercise first thing in the morning; there was no sight improvement in those who did the sessions in the afternoon.
The researchers tested the light therapy on 20 volunteers, aged between 34 and 70, who used a LED torch for three minutes every morning between 8 and 9am. On average, there was a major improvement in their colour vision a few hours later, and it lasted an entire week for some.
It’s an inexpensive way to improve our vision, the researchers say, and it can be achieved by using a simple 8mW/cm2 torch that transmits a long wavelength light.
(Source: Scientific Reports, 2021; 11; doi: 10.1038/s41598-021-02311-1)
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