#sun-exposure

#sun-exposure

Rare Disease Day, on 28 February, highlights the more than 6,100 conditions identified worldwide, including xeroderma pigmentosum (XP), a rare genetic disorder that affects just over 100 people in France. Those affected are often referred to as Children of the Moon, a name that reflects their extreme sensitivity to ultraviolet light.

I caught myself doing it again last week-meticulously applying sunscreen to my face while completely ignoring my neck. It wasn't until I saw a photo from my friend's wedding that I noticed the difference. My face looked smooth and even-toned, but my neck? Let's just say it was telling a different story. The fine lines and slight sagging made me realize I'd been treating my neck like it was somehow immune to aging. Turns out, I've had it backward this whole time.

The sun is putting on a show. On Sunday the star unleashed several strong and bright solar flares, including one of the most powerful eruptions seen in decades. Far from the steadily glowing orb we sometimes picture, the sun's surface is made up of roiling plasma thrown about by twisting magnetic fields. When these fields snap, they can throw out huge bursts of energy and charged particles into spacea solar flare.

The front of the eye, and the cornea in particular, has more nerve endings per millimetre square than anywhere else in the body, says Dr Dilani Siriwardena, a consultant NHS ophthalmologist at Moorfields eye hospital in London and vice-president of the Royal College of Ophthalmologists. So it can be very sensitive. The tiniest scratch or piece of grit in your eye can feel like a brick.

Blindness is a very scary disability, says Prof Lauren Ayton, deputy director of the Centre for Eye Research Australia at the University of Melbourne. But people don't realise actually about 90% of vision loss can be prevented or treated. And like many other problems, keeping the eyes healthy so often comes down to good diet, keeping active, and regular check-ups.