Page 933 - Atlas of Histology with Functional Correlations

Vitreous chamber is a large posterior space behind lens and zonular fibers,

surrounded by retina

Photosensitive Parts of Eye

Rods and cones in the retina are sensitive to light

Afferent axons leave retina and conduct impulses from eye to brain for
interpretation

Secretions (Tears)

Each eyeball is covered with an eyelid, which contains sebaceous glands and
sweat glands (of Moll)
Above each eyeball is the lacrimal gland, which produces lacrimal secretions
or tears
Myoepithelial cells surround secretory acini in lacrimal gland

Tears contain mucus, salts, and antibacterial enzyme lysozyme
Sebaceous (tarsal) gland secretions form an oily layer on the surface of tear
film that prevents evaporation and lubricates ocular surface

Chamber Contents: Aqueous Humor and Vitreous

Body

Produced by ciliary epithelium of the eye and fills both the anterior and

posterior chambers
Bathes nonvascular cornea and lens; supplies them with nutrients and oxygen
Fluid flows from posterior to anterior chamber via the pupil

Fluid resorbed in angle between cornea and iris into canal of Schlemm and
scleral veins

Vitreous Body

Vitreous chamber located behind lens and contains transparent gelatinous
substance called vitreous body
Consists mainly of water and water-soluble proteins
Transmits incoming light, is nonrefractive, and contributes to intraocular
pressure of eyeball

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