Definition of Sclerotic

Ocular Sclera

The Sclera is derived from the Greek word sclerosis meaning “hard.” It is an opaque, elastic, and resistant fabric of the eye. It can be compared to an incomplete shell comprising approximately 90% (five-sixths) of the eye’s outer layer. The anterior part starts in the limbus and ends in the posterior optic nerve canal. The primary function of the Sclera is to protect the eye and maintain the shape of the eyeball.

The sclera is the part of the eye known as the “white,” where the support wall of the eyeball is formed, which is continuous with the transparent cornea. The conjunctiva is covered by a clear mucous membrane that helps lubricate the eye thicker in the optic nerve area. This is composed of three divisions:

The episcleritis: connective tissue lax, located below the conjunctiva.

Proper sclerotic: dense white tissue that gives you the area of ​​your color.

The lumina fusca: It is the innermost zone composed of elastic fibers.

There are several abnormalities associated with the Sclera; in which some are genetic and include:

Melanosis: Excess melanin deposits, which can swell, notch, and have a bulge on the surface of the Sclera.

Ectasia manifests as a thinning and swelling of the Sclera that can be produced as a secondary effect of trauma or inflammation.

The treatment for these anomalies is not available or is impractical.

The Sclera is a firm fibrous membrane that maintains the shape of the eye as an approximately balloon shape, which is much thicker towards the posterior backside of the eye than towards the anterior front of the eye.


The white Sclera continues around the eye, which in the majority is not visible while the eyeball is in its socket (inside the face and skull). The central eye area is not covered in the front part as it is protected by the transparent cornea.

The structure of the Sclera

The Sclera comprises white fibrous tissue interspersed with fibers and corpuscles of delicate elastic flattened connective tissue. These fibers are grouped into bundles. The blood supply to the Sclera is made through small (but not very numerous) capillary interconnections.