Sclera vs. Conjunctiva

Scleranoun

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

Scleranoun

whitish fibrous membrane (albuginea) that with the cornea forms the outer covering of the eyeball

Scleranoun

the white outer layer of the eyeball. At the front of the eye it is continuous with the cornea.

Sclera

The sclera, also known as the white of the eye or, in older literature, as the tunica albuginea oculi, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some crucial elastic fiber. In humans, and many other animals, the whole sclera is white, contrasting with the coloured iris, but in some other mammals the visible part of the sclera matches the colour of the iris, so the white part does not normally show.

Conjunctivanoun

(anatomy) A clear mucous membrane that lines the inner surface of the eyelid and the exposed surface of the eyeball or sclera.

Conjunctivanoun

The mucous membrane which covers the external surface of the ball of the eye and the inner surface of the lids; the conjunctival membrane.

Conjunctivanoun

a transparent membrane covering the eyeball and under surface of the eyelid

Conjunctivanoun

the mucous membrane that covers the front of the eye and lines the inside of the eyelids.

Conjunctiva

The conjunctiva is a tissue that lines the inside of the eyelids and covers the sclera (the white of the eye). It is composed of non-keratinized, stratified squamous epithelium with goblet cells, stratified columnar epithelium and stratified cuboidal epithelium (depending on the zone).