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Equine Special Senses - Horse Anatomy (view source)
Revision as of 15:40, 22 November 2012
, 15:40, 22 November 2012→Eye
==Eye==
==Eye==
===Introduction===
[[Image:Detailed globe.jpg|thumb|right|200px|The Globe - Copyright David Bainbridge]]
The eye is a paired organ, the organ of vision. The eye is made up of various components, which enable it to receive light stimuli from the environment, and deliver this stimuli to the [[Equine Brain - Horse Anatomy|brain]] in the form of an electrical signal. Vision involves all components of the eye. The eye is contained within the bony orbit of the head. The bony orbit is a cavity, comprising parts of the lacrimal bone (includes fossa for nasolacrimal duct) and the maxilla (includes caudal foramen of infraorbital canal). It is continuous with the temporal bone and the pterygopalatine fossa caudally. The bony orbit is located laterally in horses, as they are in most prey species. This allows horses a range of vision of more than 350°. However this wide range of monocular vision has two 'blind spots', these are straight in front of the face and directly behind the head, extending over the back and tail. This is important to consider when approaching a horse.
The eye is a paired organ, the organ of vision. The eye is made up of various components, which enable it to receive light stimuli from the environment, and deliver this stimuli to the [[Equine Brain - Horse Anatomy|brain]] in the form of an electrical signal. Vision involves all components of the eye. The eye is contained within the bony orbit of the head. The bony orbit is a cavity, comprising parts of the lacrimal bone (includes fossa for nasolacrimal duct) and the maxilla (includes caudal foramen of infraorbital canal). It is continuous with the temporal bone and the pterygopalatine fossa caudally. The bony orbit is located laterally in horses, as they are in most prey species. This allows horses a range of vision of more than 350°. However this wide range of monocular vision has two 'blind spots', these are straight in front of the face and directly behind the head, extending over the back and tail. This is important to consider when approaching a horse.
Movement of the eyeball is achieved through the contraction and relaxation of six extraocular muscles:
*''Dorsal rectus'' muscle
*''Ventral rectus'' muscle
*''Medial rectus'' muscle
*''Lateral rectus'' muscle
*''Dorsal oblique'' muscle
*''Ventral oblique'' muscle
===The Transparent Media (conjunctiva, cornea, lens, and vitreous and aqueous humour)===
==Ear==
==Ear==