Vertical section of the chorioid and inner part of the sclera.

Vertical Section of the Chorioid and Sclera

Vertical section of the chorioid and inner part of the sclera.

The choroid, ciliary body, and iris of the eyeball.

The Choroid, Ciliary Body, and Iris

The choroid, ciliary body, and iris of the eyeball.

A. A cone and two rods from the human retina (modified from Max Schultze); B. Outer part of rod separated into discs.

Cones and Rods of Retina

A. A cone and two rods from the human retina (modified from Max Schultze); B. Outer part of rod separated…

The convergence of light rays in the eyeball begins in the aqueous humor is perfected in the crystalline. But when they strike the vitreous humor, which is concave on its front surface, and also less dense than the crystalline, they diverse or spread out, and are thrown upon the back part of the eye.

Convergence of Rays in the Aqueous Humor of the Eyeball

The convergence of light rays in the eyeball begins in the aqueous humor is perfected in the crystalline.…

The cornea, which is the anterior transparent portion of the eyeball.

The Cornea

The cornea, which is the anterior transparent portion of the eyeball.

Vertical section of the cornea.

Vertical Section of the Cornea

Vertical section of the cornea.

Section of the eye. 1: Optic nerve; 2: Retina; 3: Vitreous humor; 4: Crystalline lens; 5: Aqueous humor; 6: Cornea; 7: Iris; 8: Pupil.

Eye

Section of the eye. 1: Optic nerve; 2: Retina; 3: Vitreous humor; 4: Crystalline lens; 5: Aqueous humor;…

An eye

Eye

An eye

An eye

Eye

An eye

An eye

Eye

An eye

An eye

Eye

An eye

The eye.

Eye

The eye.

The eye and eyebrow of a person's face used for seeing.

Eye

The eye and eyebrow of a person's face used for seeing.

Diagram of the eye. 1: Lines of light from end of arrow; 2: Small, inverted image in the eye.

Eye Diagram

Diagram of the eye. 1: Lines of light from end of arrow; 2: Small, inverted image in the eye.

The eye of a common owl. The length from the anterior to posterior diameter lengthened.

Bird Eye

The eye of a common owl. The length from the anterior to posterior diameter lengthened.

The eye of a fish. The anterior to posterior diameter has been decreased.

Fish Eye

The eye of a fish. The anterior to posterior diameter has been decreased.

1, the sclerotic thicker behind than in front; 2, the cornea; 3, the choriod; 6, the iris; 7, the pupil; 8, the retina; 10, the anterior chamber of the eye; 11, the posterior chamber; 12, the crystalline lens, enclosed in its capsule; 13, the vitreous humour, enclosed in the hyaloid membrane and in cells formed in its interior by that membrae; 15, the sheath; and 16, the interior of the optic nerve, in the centre of which is a small artery.

Human Eye

1, the sclerotic thicker behind than in front; 2, the cornea; 3, the choriod; 6, the iris; 7, the pupil;…

c, ciliary nerves going to be distributed in iris; d, smaller ciliary nerve; e, veins known as vasa vorticosa; h, ciliary ligament and muscle; k,l, converging fibres of iris; o, optic nerve.

Human Eye

c, ciliary nerves going to be distributed in iris; d, smaller ciliary nerve; e, veins known as vasa…

The iris and adjacent structures seen from behind. 1, the divided edge of the three coats, the choroid being the dark intermediate one; 2, the pupil; 3, the posterior surface of the iris; 4, the ciliary processes; 5, the scalloped anterior border of the retina.

Human Eye

The iris and adjacent structures seen from behind. 1, the divided edge of the three coats, the choroid…

"The Relative Position of the Lachrymal Apparatus, the Eyeball, and the Eyelids. <I>A</em>, lachrymal canals, with the minute orifices represented as two black dots to the right; <em>B</em>, tendon attached to a muscle which surrounds the circumference of the orbit and eyelids; under <em>B</em> is seen the lachrymal sac. The minute openings of the Meibomian glands are seen on the free margins of the eyelids. Below <em>A</em> is seen a small conical elevation, with black dots (the lachrymal papilla, or caruncle)." &mdash; Blaisedell, 1904

Eyeball

"The Relative Position of the Lachrymal Apparatus, the Eyeball, and the Eyelids. A, lachrymal canals,…

"The most essential parts of human vision are contained in the eyeball, a nearly spherical body, about an inch in diameter, and capable of being turned considerably in its socket by the action of various muscles." &mdash; Avery, 1895

Eyeball

"The most essential parts of human vision are contained in the eyeball, a nearly spherical body, about…

Section through the closed left eye.1. Lifting muscle 2. Upper Straight Muscle 3. Optic Nerve 4. Fatty Cushion 5. Lower straight muscle 6. Vitrous Humour 7. Lower cross muscle 8. Lower Eyelid 9. Upper eyelid 10. Crystalline lens

Eyeball

Section through the closed left eye. 1. Lifting muscle 2. Upper Straight Muscle 3. Optic Nerve 4. Fatty…

The left eyeball in horizontal section from before back. Labels: 1, sclerotic; 2, junction of sclerotic and cornea; 3, cornea; 4, 5, conjunctival membrane; 7, ciliary muscle; 10, choroid; 11, 13, ciliary processes; 14, iris; 15, retina; 16, optic nerve; 17, artery entering retina; 18, fovea centralis; 19, region where sensory part of retina ends; 26, 27, 28, are placed on the lens; 28 , suspensory ligament placed around lens; 29, vitreous humor; 30, aqueous humor in anterior chamber.

Left Eyeball in Horizontal Section

The left eyeball in horizontal section from before back. Labels: 1, sclerotic; 2, junction of sclerotic…

Diagram of a horizontal section through left eyeball and optic nerve.

Eyeball and Optic Nerve

Diagram of a horizontal section through left eyeball and optic nerve.

The left eyeball in horizontal section from before back. Labels: 1, sclerotic; 2, junction of sclerotic and cornea; 3, cornea; 4, 5, conjunctiva; 7, ciliary muscle; 10, choroid; 11, 13, ciliary processes; 14, iris; 15, retina; 16, optic nerve; 17, artery entering retina in optic nerve; 18, fovea centralis; 19, 20, region where sensory part of retina ends; 22, suspensory ligament; 24, the anterior part of the hyaloid membrane; 26, the lends; 29, vitreous humor; 30, aqueous humor.

The Eyeball in Horizontal Section

The left eyeball in horizontal section from before back. Labels: 1, sclerotic; 2, junction of sclerotic…

The left eyeball in horizontal section from before back. Labels: 1, sclerotic; 2, junction of sclerotic and cornea; 3, cornea; 4,5, conjunctiva; 6, posterior elastic layer of cornea; 7, ciliary muscle; 10, choroid; 11,13, ciliary processes; 14, iris; 15, retina; 16, optic nerve; 17, artery entering retina in optic nerve; 18, fovea centralis; 19, region where sensory part of retina ends; 22, suspensory ligament; 23 is placed in the canal of Petit, and the line from 25 points to it; 24, the anterior part of the hyaloid membrane; 26, 27, 28, are placed on the lends; 28 points to the line of attachment around it of the suspensory ligament; 29, vitreous humor; 30, anterior chamber of aqueous humor; 31, posterior chamber of aqueous humor.

Section of Left Eyeball

The left eyeball in horizontal section from before back. Labels: 1, sclerotic; 2, junction of sclerotic…

Front and side view of the eyeball.

Front and Side View of the Eyeball

Front and side view of the eyeball.

Section through ciliary region of eyeball.

Section Through Eyeball

Section through ciliary region of eyeball.

Side view of the eyeball. Labels: a, the eyeball, and b,b, are the upper and lower sides. Now in order to prevent dust and other bodies from working their way between the ball and the lid, through passages at c,c, into the socket of the eye where they would excite great inconvenience and pain, we find the common skin of the eye lids d,d, after covering their edges turn in a little way between the lid and the ball, and then turn back and are reflected over the surface of the cornea; where, to prevent the obstruction of vision, it becomes perfectly transparent.

Side View of the Eyeball

Side view of the eyeball. Labels: a, the eyeball, and b,b, are the upper and lower sides. Now in order…

Vertical section of the eyeball.

Vertical Section of the Eyeball

Vertical section of the eyeball.

In passing through the crystalline, the rays cross each other, so that those rays which pass from the lower part of an object are presented uppermost in the bottom of the eye and the reverse, so that the images of object are always inverted, or bottom side upwards. Labels: a, the aqueous; c, the crystalline; v, the vitreous humor.

Formation of an Image on the Eyeball

In passing through the crystalline, the rays cross each other, so that those rays which pass from the…

Iris, ciliary muscle, and choroid of the eye.

Iris, Ciliary Muscle, and Choroid

Iris, ciliary muscle, and choroid of the eye.

Section through the equator of the lens. Showing gradual transition of the epithelium into lens fibers.

Section Through Lens

Section through the equator of the lens. Showing gradual transition of the epithelium into lens fibers.

The muscles of the eyeball, the view being taken from the outer side of the right orbit.

Eye Muscles

The muscles of the eyeball, the view being taken from the outer side of the right orbit.

1, cartilage of the upper eyelid; 2, its lower border, showing the openings of the Meibomian glands; 3, the cartilage of the lower eyelids, also showing its border the openings of the Meibomian glands; 4, 5, the lachrymal glands; 6, its ducts; 7, the plica semilunaris; 8, the caruneula lachrymal canals; 10,11, the superior and inferior lachrymal canals; 12, the lachrymal sac; 13, the nasal duct, terminating at 14 in the lower meatus of the nose.

Eye Muscles

1, cartilage of the upper eyelid; 2, its lower border, showing the openings of the Meibomian glands;…

An instrument for observing the interior of the eye.

Ophthalmoscope

An instrument for observing the interior of the eye.

Pigment epithelium of human retina (viewed from the surface).

Pigment Epithelium of Retina

Pigment epithelium of human retina (viewed from the surface).

"Showing the attachment of the recti, or straight muscles to the eyeball, also the distribution of arteries upon the outer coat of the eye." &mdash; Blaisedell, 1904

Attachment of the recti

"Showing the attachment of the recti, or straight muscles to the eyeball, also the distribution of arteries…

"Diagrammatic section through the eyeball. xx, optic axis; k, nodal point." &mdash;Martin, 1917

Retina

"Diagrammatic section through the eyeball. xx, optic axis; k, nodal point." —Martin, 1917

The right retina as it would be seen if the front part of the eyeball with the lens and vitreous humor were removed.

The Retina

The right retina as it would be seen if the front part of the eyeball with the lens and vitreous humor…

The retina of a human eye stretched out vertical.

Eye Retina

The retina of a human eye stretched out vertical.

Diagrammatic section of the human retina.

Section of Retina

Diagrammatic section of the human retina.

Perpendicular section of mammalian retina. Labels: A, layer of rods and cones; B, outer nuclear layer; C, outer molecular layer; D, inner nuclear layer; E, inner molecular layer; F, ganglionic layer; G, stratum opticum; r, rods; c, cones, r.g, rod granules; c.g, cone granules; r.b, rod bipolars; c.b, cone bipolars; c.r, vontact of rod bipolars with the internal arborisation of cone bipolars; ar', internal arborisation of rod bipolars; c.n, centrifugal nerve fiber; h, horizontal cells; s.s, stratified spongioblasts; d.s, diffuse spongioblasts; s.g, stratified ganglion cell; M, sustentacular fiber of Muller.

Section of Retina

Perpendicular section of mammalian retina. Labels: A, layer of rods and cones; B, outer nuclear layer;…