The blue light emitted by tablets and smart phones can damage the eyes leading to blindness in older age. I use the blue light filter on my phone all the time.
Staring at a deep red light for three minutes a day can significantly improve declining eyesight, finds a new UCL-led study, the first of its kind in humans.
Medical Express
Declining eyesight improved by looking at deep red light
Brittany A Roston
Aging vision significantly improved by ‘recharging’ daily with red light
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