'Icelandic horses, goats, eyes and more eyes' - by K J S Chatrath
I am lucky to have visited Iceland twice, once in 2012 and the second time in 2016. And yes, I would love to go there again, if I could.
An Icelandic goat
Goats eyes have horizontal, rectangular pupils. This did seem bizarre at first notice as one is used to seeing the round pupils of human eyes. Getting interested in the subject I discovered that pupils of cat’s eyes have vertical slits. In a new study* vision scientist Martin Banks has found that the shape of an animal’s pupils is a clue to its place in the food chain. This study discovered that depending on the light, the shape of a domestic cat’s pupil changes from vertical slit to almost fully round muscles on either side of the cat’s pupil open the slit wide or cause it to narrow.
Cat's eyes
Incidentally any semi-precious gem reflecting a band of light that shifts position as the gem is turned is called 'cat's eye'!
But the ways of nature continue puzzling us. This is what the pupils in the eyes of a Geckos (Gekkota) look like.
And here is pupil of somewhat awe inspiring eye of a crocodile.
And now to human eyes. Afghan Girl is a 1984 photographic portrait of Sharbat Gula taken by photojournalist Steve McCurry. It appeared on the June 1985 cover of National Geographic magazine. The image is of an adolescent girl with green eyes in a red headscarf looking intensely at the camera.
What better way to end this than by sharing the photo of beautiful eyes a Nordic girl?
Quite a fascinating subject. Never really think about rectangular, vertical slits. I wonder if this is to protect retinas of different creatures.
ReplyDeleteIcelandic horses running around lying down with no fear of humans fascinating. Let's remember horses, camels take time to get up from sit down posture. Scandinavians got a bigger share of common sense when God created humans 🙂
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