Flashcards in Orbit Deck (39)
What are the orbital contents?
Eyeball, fat, connective tissues, extraocular muscles, nerves and blood vessels
What is within the tarsal plates?
Dense connective tissue, support eyelid and glands
What are the two ligaments in the eye?
Suspensory ligaments and check ligaments
What does the suspensory ligament do?
What does the check ligaments do?
Restrict medial and lateral recti
What is within the vascular layer of the eye?
Ciliary body and choroid
What is the middle coat called?
What are the fibrous layer called?
Cornea and Sclera
What is the inner layer called?
What is the Macula Lutea of the retina?
What does the retina contain?
Rods and cones
What controls the blind spot in the retina?
What is the function of the Aqueous humor?
Helps maintain intra-ocular pressure
What is the Aqueous humor made of?
Where does the Aqueous humor drain into?
Corneo-scleral junction (Canal of Schlemm)
Describe the Vitreous humor (body)
Embryological, Transparent jelly, posterior to lens and supports retina
What are the Intraocular (intrinsic) muscles?
Dilator pupillae and Sphincter pupillae
What does the Dilator papillae do?
Increases the diameter of the pupil
What does the Sphincter pupillae do?
Decrease the diameter of the pupil
What is the ciliary muscle?
Intrinsic eye muscle that changes the shape of the lens for accommodation
What nerve passes through the ciliary muscle?
How many extraocular muscles are there?
What are the 7 extraocular muscles?
Superior Oblique and Inferior Oblique
What is the action of the Levator Palpebrae?
Raise upper eyelid
What is the action of the Superior Rectus?
Elevation, Adduction and intorsion
What is the action of the Inferior Rectus?
Depression, Adduction and extorsion
What is the action of the Medial Rectus?
What is the action of the Lateral Rectus?
What is the action of the Superior Oblique?
Intorsion, depression an abduction