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The Human Sensory Systems: Sight ClipArt gallery offers 189 illustrations related to human vision.

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;…

"Diagrammatic horizontal section of the eye of man. c, cornea; ch. choroid (dotted); C. P, ciliary processes; e. c, epithelium of cornea; e. cj, conjunctiva; f. c, yellow spot; I, iris; L, lens; ON, optic nerve; OS, ora serrata; o-x, optic axis; p. c. R, anterior non-visual portion of retina; P. E, pigmented epithelium (black); R, retina; sp. l, suspensory ligament; Scl, sclerotic; V. H, vitreous body." -Parker, 1900

Human Eye

"Diagrammatic horizontal section of the eye of man. c, cornea; ch. choroid (dotted); C. P, ciliary processes;…

Diagrams of how an image is displayed with a normal eye (top image), myopic or nearsighted eye (middle image), and a hypermetropic or far-sighted eye. In a human, the retina "sees" an image upside down and the brain rights the image.

Human Eye

Diagrams of how an image is displayed with a normal eye (top image), myopic or nearsighted eye (middle…

"Section of the human eye." — Blaisedell, 1904

Human eye

"Section of the human eye." — Blaisedell, 1904

The lachrymal apparatus of the right eye.

Lachrymal Apparatus of the Eye

The lachrymal apparatus of the right eye.

Lens of the eye. The rays of light are brought nearer together by the lenses of the eye, just as they are by the lenses of the telescope.

Lens of the Eye

Lens of the eye. The rays of light are brought nearer together by the lenses of the eye, just as they…

"Diagram showing the Change in the Lens during Accomadation. On the right the lens is arranged for distant vision, the cilliary muscle is relaxed, and the ligament <em>D</em> is tense, so flattening by its compression the front of the lens <em>C</em>, on the left the muscle <em>A</em> is acting, and this relaxes the ligament and allows the lens <em>B</em> to become more convex, and so fitted for the vision of near objects." — Blaisedell, 1904

Lens of the eye

"Diagram showing the Change in the Lens during Accomadation. On the right the lens is arranged for distant…

"Human Eye, in Median Vertical Anteroposterior Section. (Ciliary processes shown, through not all lying in this section.) A, anterior, and A', posterior chambers of aqueous humor; a, central artery of retina; C, cornea; Ch, choroid; cj, conjunctiva; cm, ciliary muscle; cp, ciliary processs; H, hyaloid; I, iris; L, crystalline lens in its capsule (the reference-line passes through the pupil); l, l', insertion of tendon of superior and inferior rectus muscles; o, optic nerve; P, canal of Petit; R, retina; S, sclerotic; s, s', circular sinus or canal of Schlemm; V, vitreous body filling back part of the eye." -Whitney, 1911

Median Vertical Anteroposterior Section of Eye

"Human Eye, in Median Vertical Anteroposterior Section. (Ciliary processes shown, through not all lying…

The muscles of the eyeball, which are 6 in number (4 recti and 2 oblique), which are inserted into the sclerotic coat, just behind the margin of the cornea.

Eye, Muscles of

The muscles of the eyeball, which are 6 in number (4 recti and 2 oblique), which are inserted into the…

Side view of the muscles of the eye in their natural positions. Labels: a,b,c,d, the four straight muscles. a. is turned up to prevent the others from being hidden. e. the superior oblique muscle. f. the optic nerve. The other oblique muscle is not shown, but it lies on the other side of the ball, and comes round, and is inserted near the superior oblique; so that they pull opposite ways, like two men sawing timber. By the combined action of all these muscles, an infinite variety of motions of the eye can be produced.

Muscle of the Eye

Side view of the muscles of the eye in their natural positions. Labels: a,b,c,d, the four straight muscles.…

The muscles of the right eye. Labels: A, superior straight; B, superior oblique passing through a pulley, D; G, inferior oblique; H, external straight, and , back of it, the internal straight muscle.

Muscles of the Eye

The muscles of the right eye. Labels: A, superior straight; B, superior oblique passing through a pulley,…

Muscles of the right eye.

Muscles of the Eye

Muscles of the right eye.

Sensory nerves of the eye.

Nerves of the Eye

Sensory nerves of the eye.

"Showing how the image of an object which is seen is formed on the retina of the eye." —Croft 1917

Eye Focusing on Object

"Showing how the image of an object which is seen is formed on the retina of the eye." —Croft 1917

Outer surface of the middle or vascular coat of the eyeball showing the the ciliary gangliated plexus and the ciliary nerves entering the plexus.

Outer Surface of the Middle Eye

Outer surface of the middle or vascular coat of the eyeball showing the the ciliary gangliated plexus…

Sagittal section of the eye, showing superior and inferior fornices of the conjuctiva.

Sagittal Section of the Eye

Sagittal section of the eye, showing superior and inferior fornices of the conjuctiva.

The upper half of a sagittal section through the front of the eyeball.

Sagittal Section Through the Eye

The upper half of a sagittal section through the front of the eyeball.

Section of the eye magnified, showing the ciliary processes, the pigmentum nigrum, the retina, and the choroid coat.

Section of the Eye

Section of the eye magnified, showing the ciliary processes, the pigmentum nigrum, the retina, and the…

The vitreous humor and crystalline lens of the eyeball magnified, with the stains of the pigmentum nigrum left by the ciliary processes.

Section of the Eye

The vitreous humor and crystalline lens of the eyeball magnified, with the stains of the pigmentum nigrum…

Section of the eye magnified, showing the crystalline lens in its proper situation, between the aqueous and vitreous humors.

Section of the Eye

Section of the eye magnified, showing the crystalline lens in its proper situation, between the aqueous…

Section of the eye, showing the relations of the cornea, sclera, and iris, together with the Ciliary muscle and the cavernous spaces near the angle of the anterior chamber.

Section of the Eye

Section of the eye, showing the relations of the cornea, sclera, and iris, together with the Ciliary…

The eye. Labels: a, sclerotica; e, cornea; b, choroid; d, optic nerve; f, aqueous humor; g g , iris; h, lens; i, vitreous humor; c, retina.

The Eye

The eye. Labels: a, sclerotica; e, cornea; b, choroid; d, optic nerve; f, aqueous humor; g g , iris;…

The middle or vascular coat of the eyeball exposed from without. Left eye, seen obliquely from above and before.

Vascular Coat of the Eye

The middle or vascular coat of the eyeball exposed from without. Left eye, seen obliquely from above…

"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,…

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 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." — Avery, 1895

Eyeball

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

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…

Section of the eyeball. Labels: Con, conjunctiva; C, cornea; A, aqueous humor; I, iris; L, crystalline lens; V, vitreous humor; Sc, sclerotic coat; Ch, choroid coat; R, retina; O, optic nerve, Cm, ciliary muscle.

Section of the Eyeball

Section of the eyeball. Labels: Con, conjunctiva; C, cornea; A, aqueous humor; I, iris; L, crystalline…

Horizontal section of the eyeball, showing the suspensory ligament of the lens, the aqueous and vitreous chambers, entrance of the optic nerve, and the fovea centralis.

Eyeball

Horizontal section of the eyeball, showing the suspensory ligament of the lens, the aqueous and vitreous…

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…

The eyeball with its muscles attached. The upper muscle not attached to the ball belongs to the upper eyelid. The muscle in front is cut away.

The Eyeball with its Muscle

The eyeball with its muscles attached. The upper muscle not attached to the ball belongs to the upper…

Artificial eye.

External Muscles of the Eyeball

Artificial eye.

Front and side view of the eyeball.

Front and Side View of the Eyeball

Front and side view of the eyeball.

"<em>A</em>, attachment of tendon connected with the four recti muscles; <em>B</em>, external rectus, divided and turned downward, to expose the internal rectus; <em>C</em>, inferior rectus; <em>D</em>, internal rectus; <em>E</em>, superior rectus; <em>F</em>, superior oblique; <em>H</em>, pulley and reflected portion of the superior oblique; <em>K</em>, inferior oblique; <em>L</em> and <em>M</em>, portions of the muscle which raises the upper eyelid; to the right of <em>D</em> and to the left on the same line are seen cut ends of the optic nerve." &mdash; Blaisedell, 1904

Muscles of the eyeball

"A, attachment of tendon connected with the four recti muscles; B, external rectus,…

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.

The eyeballs and their muscles as seen when the roof of the orbit has been moved and the fat in the cavity has been partly cleared away. On the right side the superior rectus muscle has been cut away. Labels: a, external rectus; s, superior rectus; i, internal rectus; t, superior oblique.

The Eyeballs and Their Muscles

The eyeballs and their muscles as seen when the roof of the orbit has been moved and the fat in the…

This diagram shows the eyelids and the tear-glands. The eyelid is a thin fold of skin and muscle that covers and protects the eye. The tear-glands are in charge of keeping moisture in our eyes.

Eyelashes

This diagram shows the eyelids and the tear-glands. The eyelid is a thin fold of skin and muscle that…

A vertical section of the upper eyelid.

Eyelid

A vertical section of the upper eyelid.

The tarsi and their ligaments.

Eyelid

The tarsi and their ligaments.

"Showing how the upper eyelid may be everted with a pencil or penholder." — Blaisedell, 1904

Everted eyelid

"Showing how the upper eyelid may be everted with a pencil or penholder." — Blaisedell, 1904

The Meibomian glands, ect., seen from the inner surface of the eyelids.

Inner Surface of the Eyelid

The Meibomian glands, ect., seen from the inner surface of the eyelids.

Vertical section through the upper eyelid. Labels: a, Skin; b, Orbicularis palpebrarum; b', Marginal fasciculus of Orbicularis (ciliary bundle); c, Levator palpebrae; d, Conjuctiva; e, Tarsal plate; f, Meibomian gland; g, Sebaceous gland; h, Eyelashes; i, Small hairs of skin; j, Sweat glands; k, Accessory lacrimal glands.

Vertical Section Through Eyelid

Vertical section through the upper eyelid. Labels: a, Skin; b, Orbicularis palpebrarum; b', Marginal…

<em>A</em> and <em>C</em>, lachrymal canals; <em>B</em>, lachrymal sac; <em>D</em>, small muscle which serves to compress the lachrymal sac; <em>F</em>, glands upon the inner surface of the eyelids, with ducts opening upon the free margins of the eyelids; <em>H</em>, great openings, or antrum, of the upper jawbone. The oil glands of the nose are plainly shown." &mdash; Blaisedell, 1904

Eyelids and lachrymal apparatus

A and C, lachrymal canals; B, lachrymal sac; D, small muscle which…

The eyelids separated, and viewed from behind. Labels: a, the lachrymal gland; b, the ducts from the lachrymal gland; c, the mouths of these ducts; d, the puncta lachrymalia; e, the meibomian glands, which secrete the oily fluid.

Eyelids, Viewed from Behind

The eyelids separated, and viewed from behind. Labels: a, the lachrymal gland; b, the ducts from the…

The eyelids viewed from before; a,a, the lachrymal canals; b, the lachrymal sack. The lachrymal sac is a bag of an oval shape, fixed to the end of the double canal, and lies in a depression of the nasal bones. It terminates in the tube called the duct, which passes through a hole made for it, in the bones of the nose, and opens into the nostril.

Eyelids, Viewed from the Front

The eyelids viewed from before; a,a, the lachrymal canals; b, the lachrymal sack. The lachrymal sac…

"A representation of the manner in which the image is formed in the eye, when the cornea or crystalline lens is flattened. The perfect image would be produced at m m, behind the retina, and, of course, beyond the point necessary to secure perfect vision." —Wells, 1857

Flattened Eye

"A representation of the manner in which the image is formed in the eye, when the cornea or crystalline…

Diagram to illustrate the mechanism of accommodation (focusing); on the right half of the figure for a near, on the left for a distant, object. Labels: rf, ciliary muscle; ch, ciliary process of choroid; sl, suspensory ligament; i, iris.

Focusing of the Eye

Diagram to illustrate the mechanism of accommodation (focusing); on the right half of the figure for…

Suppose a person was looking at a church with a tree standing at its side, he would have in each eye an actual inverted panorama of the objects, as seen in this image. The mind then reads this image as right-side up.

Formation of an Image on the Eyeball

Suppose a person was looking at a church with a tree standing at its side, he would have in each eye…

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…

An illustration depicting the formation of circles of diffusion. "From point A luminous rays enter the eye in the form of a cone, the kind of which will depend on the pupil. Thus it may be circular, or oval, or ever triangular. If the pencil is focused in front of the retina, as at d, or behind it as it as at f, or, in other words, if the retina of being at F; be in the position G or H, there will be a luminous circle or a luminous triangular space, and many elements of the retina will be affected. The size of these diffusion circles depends on the distance from the retina of the point where the rays are focused: the greater the distance, the more extended will be the diffusion circle" (Britannica, 132).

Formation of Circles of Diffusion

An illustration depicting the formation of circles of diffusion. "From point A luminous rays enter the…

Section of the head through the eyeballs.

Cross Section of Head Through Eyeballs

Section of the head through the eyeballs.

This diagram shows a side view of the right eye of man. a.c., central artery; a.h., aqueous humor; b., blind spot, the entrance of the optic nerve; c, conjunctiva; ch., choroid layer of the eye-ball; c.l., crystalline lens; c.m.c., circular fibers of the ciliary muscles; c.m.r., radial fibers of the ciliary muscles; co., cornea, the transparent portion of the sclerotic; c.p., ciliary process; c.s., canal of Schlemm, a lymphatic vessel; fo., fovea centralis, the point of clearest vision; o.n., optic nerve; o.s., ora serrata, the anterior wavy margin of the visual portion of the retina; r, the retinal layer; sc., sclerotic layer; sh., sheath of theoptic nerve; v.h., vitreous humor.

Human Eye

This diagram shows a side view of the right eye of man. a.c., central artery; a.h., aqueous humor; b.,…

"...where we suppose that the object a, is brought within an inch or two of the eye, and that the rays proceeding from it enter the pupil so obliquely as not to be refracted b the lens, so as to form a distinct image." -Comstock 1850

Indistinct Vision

"...where we suppose that the object a, is brought within an inch or two of the eye, and that the rays…

"The actual position of the vertical object a, as painted on the retina, is therefore such as is represented by the figure." -Comstock 1850

Inversion of Objects by the Eye

"The actual position of the vertical object a, as painted on the retina, is therefore such as is represented…

The iris, the ciliary muscle, and the coroidea membrane.

Iris, Ciliary Muscle and Coroidea Membrane

The iris, the ciliary muscle, and the coroidea membrane.

Iris, ciliary muscle, and choroid of the eye.

Iris, Ciliary Muscle, and Choroid

Iris, ciliary muscle, and choroid of the eye.