Sclera

sclerotizedsclerotisedwhites of the eyesscleraewhite part of the eyebulbareye ballscleral canalwhitewhite of the eye
The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some elastic fiber.wikipedia
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Human eye

eyeeyeseyeball
The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some elastic fiber.
The outermost layer, known as the fibrous tunic, is composed of the cornea and sclera.

Iris (anatomy)

irisirisesirides
In humans, the whole sclera is white, contrasting with the coloured iris, but in other mammals the visible part of the sclera matches the colour of the iris, so the white part does not normally show.
The outer edge of the iris, known as the root, is attached to the sclera and the anterior ciliary body.

Cooperative eye hypothesis

This makes it easier for one individual to infer where another individual is looking, and the cooperative eye hypothesis suggests this has evolved as a method of nonverbal communication.
Unlike other primates, human beings have eyes with a distinct colour contrast between the white sclera, the coloured iris, and the black pupil.

Conjunctiva

conjunctivalconjuctivabulbar conjunctiva
Along with the vessels of the conjunctiva (which is a thin layer covering the sclera), those in the episclera render the inflamed eye bright red.
The conjunctiva is a tissue that lines the inside of the eyelids and covers the sclera (the white of the eye).

Globe (human eye)

globe globeeyeball
The sclera forms the posterior five-sixths of the connective tissue coat of the globe.
A hollow structure, the bulbus oculi is composed of a wall enclosing a cavity filled with fluid with three coats: the sclera, choroid, and the retina.

Choroid

choroidalchorioretinalchoroid diseases
The inner third joins with some choroidal tissue to form a plate (lamina cribrosa) across the optic nerve with perforations through which the optic fibers (fasciculi) pass.
The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye, containing connective tissues, and lying between the retina and the sclera.

Cornea

cornealcorneal diseasecorneal diseases
It is continuous with the dura mater and the cornea, and maintains the shape of the globe, offering resistance to internal and external forces, and provides an attachment for the extraocular muscle insertions.
The human cornea borders with the sclera via the corneal limbus.

Episcleral layer

episcleraepiscleral
Along with the vessels of the conjunctiva (which is a thin layer covering the sclera), those in the episclera render the inflamed eye bright red.
The episclera is the outermost layer of the sclera (the white of the eye).

Lamina cribrosa sclerae

lamina cribrosa
The inner third joins with some choroidal tissue to form a plate (lamina cribrosa) across the optic nerve with perforations through which the optic fibers (fasciculi) pass.
The nerve fibers forming the optic nerve exit the eye posteriorly through a hole in the sclera that is occupied by a mesh-like structure called the lamina cribrosa.

Sclerotic ring

scleral ringsclerotic ringsscleral rings
In many vertebrates, the sclera is reinforced with plates of cartilage or bone, together forming a circular structure called the sclerotic ring. In primitive fish, this ring consists of four plates, but the number is lower in many living ray-finned fishes, and much higher in lobe-finned fishes, various reptiles, and birds.
They can be made up of single bones or multiple segments and take their name from the sclera.

Jaundice

icterusyellowish skincholestatic jaundice
Yellowing of the sclera is a visual symptom of jaundice.
Jaundice, also known as icterus, is a yellowish or greenish pigmentation of the skin and whites of the eyes due to high bilirubin levels.

Extraocular implant

eye jewelry
Extraocular implant
An extraocular implant (also known as eyeball jewelry) is a cosmetic implant involving a tiny piece of decorative jewelry which is implanted within the superficial, interpalpebral conjunctiva or sclera of the human eye.

Corneal limbus

limbuscorneoscleral limbusLimbal
The corneal limbus is the border of the cornea and the sclera (the white of the eye).

Scleral tattooing

Scleral tattooing
Scleral tattooing is the practice of tattooing the sclera, or white part of the human eye.

Anterior ciliary arteries

The anterior ciliary arteries are seven small arteries in each eye-socket that supply the conjunctiva, sclera and the rectus muscles.

Long posterior ciliary arteries

long
They pierce the posterior part of the sclera at some little distance from the optic nerve, and run forward, along either side of the eyeball, between the sclera and choroid, to the ciliary muscle, where they divide into two branches.

Short posterior ciliary arteries

They pass forward around the optic nerve to the posterior part of the eyeball, pierce the sclera around the entrance of the optic nerve, and supply the choroid (up to the equator of the eye) and ciliary processes.

Suprachoroid lamina

lamina fuscasuprachoroidea
lamina fusca
The spaces between the lamellæ are lined by endothelium, and open freely into the perichoroidal lymph space, which, in its turn, communicates with the periscleral space by the perforations in the sclera through which the vessels and nerves are transmitted.

Collagen

procollagencollagenscollagen fibers
The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some elastic fiber.

Elastic fiber

elastic tissueelastic fiberselastic
The sclera, also known as the white of the eye, is the opaque, fibrous, protective, outer layer of the human eye containing mainly collagen and some elastic fiber.

Embryo

embryosembryonalhuman embryos
In the development of the embryo, the sclera is derived from the neural crest.

Neural crest

neural crest cellsneural crest cellcrest
In the development of the embryo, the sclera is derived from the neural crest.

Nonverbal communication

non-verbal communicationnonverbalnon-verbal
This makes it easier for one individual to infer where another individual is looking, and the cooperative eye hypothesis suggests this has evolved as a method of nonverbal communication.

Connective tissue

fibrous tissuefibrous connective tissueconnective
The sclera forms the posterior five-sixths of the connective tissue coat of the globe.

Dura mater

duraduralcovering of the spinal cord
It is continuous with the dura mater and the cornea, and maintains the shape of the globe, offering resistance to internal and external forces, and provides an attachment for the extraocular muscle insertions.