Microscopic Anatomy of Selected Male and Female Reproductive Organs.
Microscopic Anatomy of the eye - NC State Veterinary Medicine · 2018-06-05 · Microscopic Anatomy...
Transcript of Microscopic Anatomy of the eye - NC State Veterinary Medicine · 2018-06-05 · Microscopic Anatomy...
Microscopic Anatomy of the eyeDogCat
HorseRabbit
Monkey
Richard R Dubielzig
Mammalian globes
Mammalian Phylogeny
General AnatomyDog
Arterial Blood Vessels of the Orbit
General AnatomyDog
Blood Supply
Horizontal sectionLong Posterior Ciliary a.
Blood enters the globeShort Post. Ciliary aLong Post. Ciliary a.Anterior Ciliary a.
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General AnatomyDog
Major arterial circle of the iris
Orbital AnatomyDog
Zygomatic
Dorsal rectus
Levator
Ventral rectus
Brain
Lymphnode
Orbital AnatomyDog
Orbital AnatomyDog
Cartilaginous trochlea and the tendon of the dorsal oblique m.
Orbital AnatomyDog
Rabbit
Orbital AnatomyDog
Zygomatic salivary glandmucinous gland
Orbital AnatomyDog
Gland of the Third Eyelid
Eye lids (dog)
Eye lids (dog)
Holocrine secretion
Meibomian glands at the lid margin
Eye lids (primate)
Upper tarsal plate
Lower tarsal plate
Eye lids (rabbit)
The Globe
The Globe
Dog CatOrangutan
Horse
Diurnal
Diurnal
Cornea
Epithelium
Stromal lamellae
Descemet’s m
Endothelium
Bowman’s layerDolphin
TEM of surface epithelium
Cornea
Doubling of Descemet’sVimentin + endothelium
Iris
Walls: The vertebrate eye
Iris
Dilator m
Sphincter m.
Blue-eye, GFAP stain
Iris Collagen
IrisCat
Sphinctor m.Dilator m.
IrisCat
Phyomelanocytes
Iris
Equine Corpora nigra (Granula iridica)seen in ungulates living without shade
Ciliary body
Pars plana
Pars plicata
Ciliary muscle
Ciliary body
Zonular ligaments
Ciliary body
Primarily made of fibrillinA major component of elastin
Ciliary body
Alcian Blue staining acidmucopolysaccharides: Hyaluronic acid
Ciliary body
The ciliary muscleIn accommodation
and in IOP
Primate
Filtration apparatusCanine
Filtration apparatusCanine
Corneoscleral Trabecular Meshwork
Filtration apparatusCanine
Collecting vessels
Filtration apparatusCanine
Angular aqueous plexus: AAP
Corneoscleral trabecular meshwork: CTM
Collecting vessels: CV
Coronal section
AAP
AAP AAPCTM
CTM
CV
CV
Filtration apparatusFeline
Filtration apparatus Equine
Angular aqueous plexus
Filtration apparatusPrimate
Schlemm’s canal
Filtration apparatusRabbit
Schlemm’s canal
Filtration apparatus
Canine
Uveoscleral trabecular meshworkthe alternative pathway
Vortex veins
Uveoscleral trabecular meshworkthe alternative pathway
Lens
Canine
LensEmbryo
Lens
Lens
Nuclear bow
Lens
Posterior suture
FundusCanine
Tapetum
Normalfundus
FundusCanine
Arteries Veins
FundusEquine
Paurangiotic retina
Fundus Rabbit
Merangiotic retina
Myelinated medullary ray
Rabbit Medullary Ray
Fundus Primate
Fovea
Retinal vessels come from the central retinal artery in the middle of the optic nerve
FundusCanine
Fluorescein angiography
Early arterial fillingLate arterial filling
Arteries come from the short posterior ciliary arteries
Retina
Retina
Retina
Feline Area Centralis
Cone“bouquet”
Ganglioncells
RetinaPrimate foveaTemporal to the ON
RetinaNerve fiber layer Individual axons separated
by astrocytes
Retina
Primate Retina
Feline Retina
Images from Caroline Zeiss
Cone ArrestinLabelling cones
Rod ArrestinLabelling rods
Primate Retina
This section is across the inner segments of the photoreceptorsand cuts across larger cone inner segments and smaller rods
Retina
Plastic section of thePeripheral primate retinaShowing mostly rodOuter segments and a few conesC
R
RPE
Choriocapillaris and Bruch’s Membrane
The choriocapillaris is the most heavily perfused capillary bed in the body
Choriocapillaris and Bruch’s Membrane
5 layers of Bruch’s membrane
• 2 Basement membranes• 2 collagen layers • Central elastic layer
Choriocapillaris
Canine tangential section
RPE
Choriocapillaris
Cellular Tapetum LucidumCarnivore
Nontapetal Tapetal Tapetal
Eye Shine - Canine
Protein +zinc units
Cellular Tapetum LucidumFeline
Melan-A+ & protein & riboflavin
Autofluorescent
Pinniped Cellular Tapetum
Upper Lower
Fibrous Tapetum LucidumUngulates & Cetaceans
Equine
Dolphin
Impala
Tapiror
Hippo
Fibrous Tapetum Lucidum
Thick fibrous tapetumof the tapir
Impala tapetumPicrosirious redPolarized light
Optic Nerve
Optic Nerve
Optic Nerve
Optic Nerve
Optic Nerve