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Eye Anatomy

QuestionAnswer
Mucous membrane lining the inner surface of the eyelids and covering the surface of the eye Conjunctivia
Located in the lateral aspect of the roof of the orbit, superior and inferior parts Lacrimal Gland
Part of the eye where secretions from this gland pass through 6-12 ducts which open onto the conjunctiva Lacrimal Gland
Small openings into superior and inferior lacrimal canaliculi Superior and Inferior Lacrimal Puncta
Small tubular ducts leading to lacrimal sac Superior and Inferior Lacrimal Canaliculi
Enlarged cavity located in fossa for lacrimal sac Lacrimal Sac
Duct running from lacrimal sac and opening into nasal cavity Nasolacrimal Duct
Small reddish conical body of skin containing sebaceous and sweat glands Lacrimal Caruncula
Source of whitish secretion that collects in this area Lacrimal Caruncula
A semilunar fold of conjunctiva Plica Semilunaris
A triangular space at the medial angle of eye where tears collect Lacrimal Lake
Route of Tears Lacrimal Gland, Lacrimal Lake, Lacrimal Puncta, Lacrimal Canaliculi, Lacrimal Sac, Nasolacrimal Duct, Nasal Cavity
Outer layer of eyeball Sclera
Middle layer of eyeball Choroid
Inner layer of eyeball Retina
Contains axons leading from the retina to brain Optic Nerve
Retina contains what rod and cone receptors
Outer surface of the optic nerve is covered by what? Dura
Point of exit for fibers forming optic nerve Optic Disk
Lacks rod and cone receptors, thus insensitive to light (blind spot) Optic Disk
Yellow spot about half a millimeter in diameter consisting only of cone receptors Macula Lutea
Center of macula is a small pit Fovea Centralis
Point of critical vision (sharp focus) Macula Lutea
Situated between the iris and the vitreous body Lens
What acts to focus light on the retina? Lens
Act to suspend the lens via attachment to the ciliary body Suspensory Ligaments
Contains the ciliary muscle Ciliary Body
Watery fluid secreted by the ciliary body and contained within the anterior and posterior chambers of the eye Aqueous Humor
Transparent semigelatinous substance filling the vitreous chamber Vitreous Body
Colored part of the eye just anterior to the lens and surrounds the pupil Iris
2 parts of the Iris constrictor/sphincter pupillae and dilator pupillae
Inner circular layer of smooth muscle of the Iris constrictor/sphincter pupillae
Outer radiating layer of smooth muscle of the Iris dilator pupillae
What reduces pupil diameter (to bright light)? constrictor/sphincter pupillae
what increase pupil diameter (low light)? dilator pupillae
Opening for entrance of light into the eye Pupil
Clear, transparent extension of sclera over anterior 1/6 of eye Cornea
Between iris and lens Posterior Chamber
Between iris and cornea Anterior Chamber
Posterior to lens containing the vitreous body Vitreous Chamber
Minute small cavities at junction of iris and cornea - Drains aqueous humor from the anterior chamber Trabeculae
Drains aqueous humor from the trabeculae and delivers it to small veins in the immediate area Scleral Venous Sinus (Canal of Schlemm)
Route of Aqueous Humor Ciliary body, posterior chamber, pupil, anterior chamber, trabeculae, scleral venous sinus, vein
Raises upper eyelid Levator Palpebrae Superioris
Four Recti Muscles Superior Rectus, Inferior Rectus, Medial Rectus and Lateral Rectus
Elevates and Adducts Eye Superior Rectus
Depresses and Adducts Eye Inferior Rectus
Adducts Eye Medial Rectus
Abducts Eye Lateral Rectus
Two Oblique Muscles of the Eye Superior Oblique and Inferior Oblique
Action of the Superior Oblique Muscle Depresses and Abducts
Action of the Inferior Oblique Muscle Elevates and Abducts
Created by: 1277880004