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Chameleons are known for being able to move their eyes independently of each other. They protrude far from the skull and are completely covered with scaly eyelid skin except for a narrow iris and the pupil. This anatomical peculiarity gives chameleons the effect of a pinhole camera in both eyes, allowing them to see much more clearly. Chameleons can see up to one kilometre (!) away. The focusing speed is around 60 dioptres per second – four times what a human is capable of. Chameleons mainly see colours and little contrast, which makes them practically blind at night. Small oil droplets that accumulate on the cones also provide chameleons with a kind of “built-in sunglasses”. But chameleon eyes can do much more! The chameleon has an incredibly large field of vision of 90\u00b0 vertically and 180\u00b0 horizontally. The total field of vision is a fantastic 342\u00b0! Only over the back directly behind the head is there a blind spot of 18\u00b0, in which a chameleon can see nothing. By comparison, humans only have a paltry 189\u00b0 field of vision. Chameleons also have very special lenses. The chameleon’s range of accommodation is an incredible 45 dioptres. Humans can accommodate just 15 dioptres when they are young, and even less when they are older. However, it is not known whether the chameleon’s visual acuity decreases with age.<\/p>\n
#show your colours #internationalchameleonday #chameleonday #chameleondayMay9 #agchamaeleons<\/p>\n
Foto: Auge eines Panthercham\u00e4leons, fotografiert von Brice Miller, Creative Commons<\/a> Attribution-Share Alike 4.0 International<\/a><\/p>","protected":false},"excerpt":{"rendered":" Chameleons are known for being able to move their eyes independently of each other. They protrude far from the skull and are completely covered with scaly eyelid skin except for a narrow iris and the pupil. This anatomical peculiarity gives chameleons the effect of a pinhole camera in both eyes, allowing them to see much […]<\/p>\n","protected":false},"author":7,"featured_media":5469,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[569],"tags":[626],"class_list":["post-5468","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-internationaler-chamaeleontag","tag-auge"],"yoast_head":"\n