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Sensory organ
(a) those of the special senses of taste, smell,
sight, and hearing
(b) those associated with the general
sensations of heat, cold, pain, pressure, etc.
Exteroreceptor
Interoreceptor
Proprioceptor
Visual organ
• eyeball
• accessory organs of eye
• blood vessel and nerves
of eye
eyeball
• wall
• The Refracting
Media
• (1) A fibrous tunic,
consisting of the sclera
behind and the cornea in
front;
• (2) a vascular pigmented
tunic, comprising, from
behind forward, the
choroid, ciliary body, and
iris;
• (3) a nervous tunic, the
retina.
Fibrous tunic
• The Sclera
• The Cornea.—
•
•
•
•
•
(1) corneal epithelium,
(2) substantia proprius
(3) posterior elastic lamina;
(4) endothelium
anterior chamber.
• Between this tissue and the anterior surface of the attached
margin of the iris is an angular recess, named the iridial
angle or filtration angle of the eye
The Vascular Tunic
• formed from behind forward：
choroid, the ciliary body,
and the iris.
• The choroid: five-sixths of
the bulb,
• The ciliary body connects
the choroid to the
circumference of the iris.
• The iris is a circular
diaphragm behind the
cornea, a rounded aperture,
the pupil.
The Retina
(tunica interna)
• delicate nervous membrane,
outer surface is the choroid; its
inner with the hyaloid
membrane of the vitreous body.
pars ciliaris retinæ and pars
iridica retinæ
• Exactly in the center of the
posterior, and at a point sense
of vision is most perfect, is an
oval yellowish area, the
macula lutea; in the macula is
a central depression, the fovea
centralis
• the arteria centralis retinæ
pierces the center of the disk.
insensitive to light, and it is
termed the blind spot.
The Refracting Media
• The Aqueous Humor
ciliary body secretesposterior chambers –pupilanterior chambers iridocorneal angle
-sinus venous sclera .
• The Vitreous Body
• The Crystalline Lens
(In old age it becomes flattened
on both surfaces, slightly opaque,
of an amber tint, and increased in
density)
Accessory Organs
•
•
•
•
•
•
ocular muscles
the fascia,
the eyebrows,
the eyelids,
the conjunctiva
the lacrimal
apparatus
Levator palpebræ superioris
Rectus medialis
Rectus superior
Rectus inferior
Obliquus inferior
oculomotor nerve
Rectus lateralis
abducent nerve
Obliquus superior
trochlear nerve
lacrimal apparatus
Lacrimal Gland
lacrimal ducts
(puncta lacrimalia, superior
duct, inferior duct)
Lacrimal Sac
Nasolacrimal Duct
(middle nasal meatus)
Vessels and Nerves
• arteria
centralis retinæ
• ciliary veins
• Optical nerves