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The orbit is the cavity or socket of the skull in which the eye and its appendages are situated. In the adult human, the volume of the orbit is 30 millilitres (1.06 imp fl oz; 1.01 US fl oz), of which the eye occupies 6.5 ml (0.23 imp fl oz; 0.22 US fl oz). [4] The orbit helps in smooth rotation of the eyeball.
Inherited eyelash problems are common in some breeds of dogs as well as horses. Eyelashes are an uncommon but not unknown feature in birds. Hornbills have prominent eyelashes (vestigial feathers with no barbs), as do ostriches. Amongst the reptiles, only Eyelash vipers show a set of modified scales over the eyes which look much like eyelashes.
Bothriechis schlegelii, known commonly as the highland eyelash-pitviper or Schlegel's eyelash-pitviper, [2] is a species of pit viper in the family Viperidae, native to Colombia. Somewhat small, arboreal snakes, B. schlegelii is perhaps best known for the namesake superciliary (" eyelash ") scales above its eyes , and for having distinctly ...