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A portion of the fibrous layer forming the outer envelope of the eyeball, except for its anterior sixth, which is the cornea. SYN: sclerotic coat, sclerotica, tunica albuginea oculi, tunica sclerotica. [Mod. L. fr. G. skleros, hard]
- blue s. appearance of the uveal tissue through a thin s. seen in a number of conditions including myopia, buphthalmos, scleral staphyloma, Ehlers-Danlos syndrome, Marfan syndrome, osteogenesis imperfecta, Paget disease, and Pierre Robin syndrome.
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sclera 'skler-ə n the dense fibrous opaque white outer coat enclosing the eyeball except the part covered by the cornea called also sclerotic, sclerotic coat
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n.
the white fibrous outer layer of the eyeball. At the front of the eye it becomes the cornea. See eye.
• scleral adj.
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scle·ra (sklērґə) gen. and pl. scleґrae [L., from Gr. skleros hard] [TA] the tough white outer coat of the eyeball, covering approximately the posterior five-sixths of its surface, and continuous anteriorly with the cornea and posteriorly with the external sheath of the optic nerve. scleral adj
Sclera.
Medical dictionary. 2011.