Science

Beauty is not in the eye of the beholder

It is in the eye itself

Beauty is not in the eye of the beholder

Yes, maybe it’s true that there are differing opinions on who we think of as attractive. Indeed, some people think Simon Cowell is good looking; still can’t get my head around that one, but I digress. Yes, people have their own personal prefernces – blonde or brunette, brainy or brawny, etc. However, numerous studies have shown that there are a significant number of traits that we all find attractive, no matter who we are. These include big eyes in women, big jaws in men, and symmetrical faces. These features are all signals to potential partners of good genetic stock. A symmetrical face, for example, shows that you are able to fight off parasites, which can distort the normal development of the body.

Well, one more trait has been added to the list of more-or-less universally attractive features – bright, white eyes. The white part of the eye – the sclera – is made of tough fibres, protecting the eye from various assaults. This white canvas, however, is rather delicate, and can be stained depending on various ailments one might suffer from. Yellow eyes, for example, can be caused by fat deposits as we age, or may indicate jaundice (a build up of bilirubin). Red eyes are caused by dilated blood vessels in the eye and can be symptomatic of anything from infection to allergy. The scientists behind the study, published in the journal Ethology, doctored 100 of pictures of eyes to make them appear bloodshot. Together with 100 healthy white eyes, the scientists asked people to rate the pictures on sadness, healthiness and attractiveness. Unsurprisingly, the white eyed folk did best on all three counts.

The sclera is an interesting part of the body to test beauty on because it is something that humans have which we don’t share with our closest relatives – chimpanzees. All non-human primates have brown or dark brown sclera. It is thought to be this colour (similar to the iris) so as to mask which direction you are looking. In humans, the eye seems to have gained a secondary function (besides preventing you bumping into things) – communication with others. As well as attractiveness, the white eye can signal gaze direction and emotion. Vital messages in an increasingly social species. Charlie Harvey

From Issue 1487

6th May 2011

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