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The sheep have a dark, horizontal rectangle in the middle of their eyes and this is their pupil. Here we will examine why sheep have rectangular pupils and how this impacts their vision.
Goats, sheep, toads and octopus pupils tend to be horizontal and rectangular with rounded corners. Some skates and rays have crescent shaped pupils, [ 17 ] gecko pupils range from circular, to a slit, to a series of pinholes, [ 18 ] and the cuttlefish pupil is a smoothly curving W shape.
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1:posterior segment 2:ora serrata 3:ciliary muscle 4:ciliary zonules 5:Schlemm's canal 6:pupil 7:anterior chamber 8:cornea 9:iris 10:lens cortex 11:lens nucleus 12:ciliary process 13:conjunctiva 14:inferior oblique muscule 15:inferior rectus muscule 16:medial rectus muscle 17:retinal arteries and veins 18:optic disc 19:dura mater 20:central retinal artery 21:central retinal vein 22:optic nerve ...
An infobox to describe a breed of sheep Template parameters [Edit template data] This template prefers block formatting of parameters. Parameter Description Type Status Name name Name of the sheep breed String required Image image Image of the sheep. Format: image.ext File suggested Image size image_size Size of the image Number optional Image alt text image_alt Alternative text to describe ...