The cat possesses an open orbit, differing slightly from that of the dog as it is more constricted in its middle portion where the orbital ligament divides it into two parts, one containing the eyeball, and the hinder part the upper end of the lower jawbone. The palpebral orifice, the space between the eyelids, is larger and more circular in the cat than in any but the short-faced varieties of dog, and the whole of the cornea is exposed when the eye is fully open.
KeywordsOpen Orbit Ciliary Muscle Optical Divergence Animal World Vertical Slit
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