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Eyeball

Other Terms: Bulbus oculi, Bulbe de l'oeil, Globe oculaire, Augapfel, Globo ocular, Mata

Description

The eyeball is almost spherical, but not perfectly so, mainly because its anterior, clear, or corneal segment has a greater curvature than the rest of the eye. Considering it as a globe, it has an anterior pole and a posterior pole; the former corresponding to the center of the front of the cornea, the latter to the center of the posterior curvature. An imaginary straight line joining, the two poles is called the axis of the eyeball. The equator of the eye is that part of its surface which lies midway between the two poles. The optic nerve joins the globe three or four mm to the nasal side of the posterior pole. The shape of the eye depends on, and is preserved by, the outermost tunic, formed conjointly by the cornea and sclera. All around the cornea there remains a little adherent conjunctiva; elsewhere, the sclera is directly exposed, except for some loose connective tissue which adheres to it, especially around the optic nerve entrance. In front of the equator we see the tendinous insertions of the four recti muscles. Behind the equator are the insertions of the two oblique muscles-that of the superior oblique tendinous, and further forward, under the superior rectus; that of the inferior more fleshy, and placed between the optic nerve and the lateral rectus.

Latin

Bulbus oculi

French

Bulbe de l'oeil

French

Globe oculaire

German

Augapfel

Spanish

Globo ocular

Filipino

Mata

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