During the second world war, British propagandists circulated rumours that RAF pilots were such good night fliers because all the carrots they ate helped them to see in the dark. In reality the British were trying to keep their use of radar secret.
Yet it turns out that there is some truth to the idea that diet can affect our eyes. Retinal cells contain three yellow pigments – lutein, zeaxanthin and meso-zeaxanthin – which absorb near-ultraviolet light, protecting the eye from its damaging effects and reducing glare. These pigments are concentrated in the centre of the retina that produces the sharp central area of our vision, the macula. "It's like wearing internal sunglasses," says Billy Hammond of the University of Georgia in Athens. "It reduces the light intensity and absorbs scatter."
PHONE FOCOSSING FOR YOUR EYES
The lenses in our eyes get stiffer as we age, making it harder to focus on things that are close up. This is why people start to need reading glasses from their 40s onwards. Eventually, nearly everyone will own a pair. But it can be a pain putting on your glasses every time you look at your phone, for instance, assuming you can remember where you put them.
Glasses work by partly focusing light before it hits the eye – so if you are looking at a screen, why not make it do the focusing for you? A team at the Massachusetts Institute of Technology has shown that plastic screen covers can correct for all kinds of vision problems – effectively, the screen wears the glasses. But rather than making plastic covers tailored to individuals' eyes, the team want to exploit the ability of
Yet it turns out that there is some truth to the idea that diet can affect our eyes. Retinal cells contain three yellow pigments – lutein, zeaxanthin and meso-zeaxanthin – which absorb near-ultraviolet light, protecting the eye from its damaging effects and reducing glare. These pigments are concentrated in the centre of the retina that produces the sharp central area of our vision, the macula. "It's like wearing internal sunglasses," says Billy Hammond of the University of Georgia in Athens. "It reduces the light intensity and absorbs scatter."
PHONE FOCOSSING FOR YOUR EYES
The lenses in our eyes get stiffer as we age, making it harder to focus on things that are close up. This is why people start to need reading glasses from their 40s onwards. Eventually, nearly everyone will own a pair. But it can be a pain putting on your glasses every time you look at your phone, for instance, assuming you can remember where you put them.
Glasses work by partly focusing light before it hits the eye – so if you are looking at a screen, why not make it do the focusing for you? A team at the Massachusetts Institute of Technology has shown that plastic screen covers can correct for all kinds of vision problems – effectively, the screen wears the glasses. But rather than making plastic covers tailored to individuals' eyes, the team want to exploit the ability of
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