Definition of Sclera

1. Noun. The whitish fibrous membrane (albuginea) that with the cornea forms the outer covering and protection of the eyeball.

Exact synonyms: Sclerotic Coat
Group relationships: Eye, Oculus, Optic
Generic synonyms: Albuginea

Definition of Sclera

1. Noun. (anatomy) The white of the eye. It is the tough outer coat of the eye that covers the eyeball except for the cornea. ¹

¹ Source:

Definition of Sclera

1. the white, fibrous outer coat of the eyeball [n -RAS or -RAE] : SCLERAL [adj]

Medical Definition of Sclera

1. 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. Origin: L., Gr. Skleros = hard This entry appears with permission from the Dictionary of Cell and Molecular Biology (11 Mar 2008)

Sclera Pictures

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Lexicographical Neighbors of Sclera

sclera (current term)
scleral buckling
scleral buckling operation
scleral diseases
scleral ectasia
scleral resection
scleral rigidity
scleral ring
scleral roll
scleral spur

Literary usage of Sclera

Below you will find example usage of this term as found in modern and/or classical literature:

1. Cunningham's Manual of Practical Anatomy by Daniel John Cunningham, Arthur Robinson (1914)
"The superficial surface of the sclera and of the cornea should now be examined ; but to complete the study of the external tunic a further dissection is ..."

2. Text-book of Ophthalmology by Ernst Fuchs (1911)
"Ectasis of t lie sclera usually entails still further changes in the interior of the ... At / may be seen how the root of the iris is applied to the sclera, ..."

3. Manual of the diseases of the eye by Charles Henry May (1914)
"The sclerotic coat (sclera) is the tunic which with the cornea forms the ... Anteriorly, the structure of the sclera is continuous with that of the cornea. ..."

4. Text-book of Ophthalmology by Ernst Fuchs, Alexander Duane (1899)
"THE sclera,* together with the cornea, forms the fibrous envelope of the ... The histological structure of the sclera is very similar to that of the cornea. ..."

5. Manual of Practical Anatomy by Daniel John Cunningham (1921)
"Select an eyeball for that purpose, and make an incision, with a sharp knife, through the sclera at the equator. The incision must be made ..."

6. Modern ophthalmology by James Moores Ball (1908)
"Con- gen-ital pigmentation of the sclera (melanosis sclera) presents either small spots or diffuse areas of discoloration. Generally there are similar ..."

7. Anatomy, Descriptive and Applied by Henry Gray (1913)
"The sclera and cornea (Fig. 838) form the fibrous tunic of the bulb of the eye ... The sclera.—The sclera has received its name from its extreme density and ..."

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