EYE Larry Johnson

VITREOUS BODY (VITREOUS HUMOR)

Aqueous humor

DEMO SLIDE BOX 23 Commercial slide. Eye, monkey Alternative human eye

choroid

anterior chamber

posterior chamber

vitreous space

lens

iris

Cornea with SEVERAL layers

Sclera

retina

Sclera

Cornea

Ciliary body

Sclera

limbus

Ciliary muscle

Sclera

Secretory epithelium of ciliary processes

Alternative human eye

DEMO SLIDE BOX 23 Commercial slide. Eye, monkey Alternative human eye

Iris with radial (dilator) muscle circular (constrictor) muscle

Posterior chamber

vitreous space

lens

Lens capsule

Anterior chamber

Anterior chamber

iris

Cornea

DEMO SLIDE BOX 23 Commercial slide. Eye, monkey

Cornea with SEVERAL layers

choroid

anterior chamber

posterior chamber

lens

Another alternative eye monkey

artifact Cornea

Optic nerve

vitreous space

sensitive retina

Sclera

ora serrata

insensitive retina

Blind spot

CILIARY BODIES

lens

lens capsule

zonules

DEMO SLIDE BOX 23 Commercial slide. Eye, monkey Another alternative eye monkey

Sclera

ciliary body

anterior chamber

posterior chamber

Secretory epithelium of ciliary body

zonules

lens

lens

trabecular meshwork outlet of aqueous humor

Source of aqueous humor

Lymphatic cannel

lens

Anterior surface

Posterior surface

Lens capsule

Lens capsule

IRIS

DILATOR (MYOEPITHELIAL) AND CONSTRICTOR (smooth) MUSCLE

DEMO SLIDE BOX 23 Commercial slide. Eye, monkey Another alternative eye monkey Iris with radial (dilator) muscle (myoepithelium)

lens

Iris

lens

posterior chamber

anterior chamber

artifact

circular (constrictor) Smooth muscle

Lens capsule and attached zonule

DEMO SLIDE BOX 23 Commercial slide. Eye, monkey

Alternative human eye Limbus is the JUNCTION OF CORNEA AND SCLERA

THE CHOROID EXTENDS AS FAR ANTERIORLY AS THE CILIARY BODY

sympathetic innervation regulates the DILATOR PUPILI MUSCLE (RADIAL MUSCLE OR DILATOR MUSCLE)

iris

the constrictor muscles of the iris? CRANIAL NERVE 3 (III) (OR OCULOMOTOR NERVE) – YOU CAN LOOK THIS INFORMATION UP IN YOUR GROSS ANATOMY TEXT

ora serrata = JUNCTION BETWEEN THE SENSITIVE AND INSENSITIVE RETINAS

Trace the flow of the aqueous humor from its production site to its site of drainage. CILIARY PROCESSES POSTERIOR CHAMBER THROUGH THE PUPIL ANTERIOR CHAMBER TRABECULAR MESHWORK VENOUS SYSTEM

trabecular meshwork

lymphatic

POSTERIOR CHAMBER

ANTERIOR CHAMBER

vitreous space

POSTERIOR CHAMBER

ANTERIOR CHAMBER

Another alternative eye monkey

BOTH THE CILIARY AND IRIDIAL PORTIONS OF THE INSENSITIVE RETINA HAVE TWO LAYERS OF CELLS. THE CILIARY PORTION HAS ONE PIGMENTED LAYER (THE outerLAYER) AND ONE NON PIGMENTED LAYER (THE inner LAYER). The innerLAYER OF CELLS ARE PIGMENTED IN THE IRIDIAL PART OF THE INSENSITIVE RETINA.

Myoepithelium inner layer of THE IRIDIAL PART OF THE INSENSITIVE RETINA.

zonules

Secretory epithelium of ciliary body

iris

Another alternative eye monkey

another human eye

Toluidine blue stained eye

Human eye Back half

Dog eye 189

Pigmented layer of epithelial cells: with pigment without pigment

Tapetum lucidum = non-pigmented CCT under pigmented epithelium layer

Little to No Tapetum lucidum Choroid

Tapetum lucidum = reflects image from back of the eye in animals that can see better in the dark that can humans

Tapetum lucidum is located at the back of the eye, but not on the sides

Given the tapetum lucidum is located at the back of the eye, the dog (animal) must be looking directly at you for you to see the reflection.

Dog eye 189

Eye

monkey

Central artery of the retina

Capillary network in retina

Pigmented layer of epithelial cells

Elaborate network of vessels, the choroid plexus.

34412

34412

lens Ligaments (zonules)

lens

Iris

Eye monkey Sites of attachment of zonules to the lens’ capsule

192 One site of attachment of a zonule to the capsule on the lens on its posterior surface

Anterior surface

Zonules

34412 Sclara

Ciliary muscle

192

Capsule and cuboidal epithelium on the anterior surface of lens

Thinner capsule on the posterior surface of the lens

Lens fibers

Demo Slide 22a-Eye, Cow

choroid Pigmented epithelium photoreceptors Bipolar cells

Cell bodies of Ganglion cells

Optic nerve fibers

Demo Slide 22a-Eye, Cow

Ciliary body

Sclera

trabecular meshwork

Individual smooth muscle cells of ciliary muscle

Secretory cells of ciliary processes Pigmented cells of ciliary processes

CCT

Secretory cells

Demo Slide 22a-Eye, Cow

Ciliary processes

Iris

Luminal layer (non pigmented) and outer layer (pigmented)

Demo Slide 22b-Eye, Cow

Ciliary body

Ciliary processes

Iris

Sclera

Demo Slide 22b-Eye, Cow Smooth muscle cells

Demo Slide 22b-Eye, Cow

choroid

Pigmented epithelium Photoreceptor cells

Bipolar cells

Ganglion cells

Optic nerve fibers

retina

Demo Slide 22b-Eye, Cow Optic nerve exiting the eye

retina

retina

Optic nerve

iris cornea Blind spot is part of retina devoid of photoreceptors