Views: 1,116. Sclera definition, a dense, white, fibrous membrane that, with the cornea, forms the external covering of the eyeball. The conjuctiva has blood vessels coursing through it. It occurs more often in young and middle-aged adults and usually improves without treatment.

For example: yellowing of sclera is an indicator of jaundice, whereas inflammation of conjunctiva … Often, patients think of the conjunctiva as the “white part of the eye.” You may find yourself trying to correct that belief by explaining that it is actually a semitransparent mucous membrane over the sclera, the “true” white part of the eye.

The conjunctiva is anterior while the episcleral layer of the sclera is posterior.

When blood from a leaking broken blood vessel is trapped between the conjunctiva and the sclera, it is called a subconjunctival hemorrhage.

Lies outer to the sclera proper and merges with the sclera close to the cornea periphery.

Both sclera and conjunctiva have different role in diagnosis of certain conditions. Pigmented lesions that arise from the conjunctiva include nevus, complexion-associated melanosis (CAM), primary acquired melanosis (PAM), and malignant melanoma. T wo of the most protective structures of the ocular system are the conjunctiva and sclera.


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The conjunctiva overlies the sclera covering it like a blanket.
The conjunctiva, a thin layer of tissue lining the eye and eyelids, contributes to homeostasis of the tear film, provides a layer of protection from foreign material and wards off infection.

Because it is loosely attached to the episclera, the bulbar conjunctiva is a useful tissue to graft to weakened, ulcerated corneas. See more.

The integrity of the conjunctiva and sclera is crucial for healthy eyes, and when it is compromised by abnormalities or inflammation, the ocular system quickly becomes chaotic.

It also lines the inside of your eyelids.

However, a number of other lesions have a similar appearance but a different source, such as pigment deposits from silver and iron. Bulbar conjunctiva: That part of the conjunctiva, a clear membrane of the eye, which covers the outer surface of the eye.. The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the eye containing mainly collagen and some elastic fiber.

However, a number of other lesions have a similar appearance but a different source, such as pigment deposits from silver and iron. The other part of the conjunctiva is the palpebral conjunctiva, which lines the inside of the eyelids. As nouns the difference between cornea and conjunctiva is that cornea is (anatomy) the transparent layer making up the outermost front part of the eye, covering the iris, pupil, and anterior chamber while conjunctiva is (anatomy) a clear mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeball or sclera. In the case of Wilson's disease we studied, the plasma bilirubin concentration reached 60 mg/dL and the degree of clinical jaundice was most remarkable, yet almost no bilirubin pigment was present in the sclera.

Chemosis is an inflammatory condition referring to a swollen conjunctiva; the mucous membrane that covers the sclera or the whites of the eyeball. While it is rare for the sclera to become inflamed (a condition called scleritis causes a deep, boring pain), the conjunctiva may swell and accumulate fluid causing a condition known as "chemosis."

However, trying to explain exactly what conjunctivochalasis is to a patient can be challenging. Pigmented lesions that arise from the conjunctiva include nevus, complexion-associated melanosis (CAM), primary acquired melanosis (PAM), and malignant melanoma. See more. Sclera definition, a dense, white, fibrous membrane that, with the cornea, forms the external covering of the eyeball.

A relatively mild nodular inflammation, called episcleritis, sometimes occurs in the superficial layers just above the sclera. As primary eye care providers, we often have patients present with symptoms of disorders that affect these structures, and it is our job to provide timely intervention.

Describe some properties of the episclera. Sclera definition is - the dense fibrous opaque white outer coat enclosing the eyeball except the part covered by the cornea. The conjunctiva is a translucent vascularized mucous membrane.
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