Eyeball A

Question 1

3 tunics of the eyeball

Answer 1

Fibrous tunic
Vascular tunic
Nervous tunic

Question 2

Sclera is the ___ part of the fibrous tunic and covers __ (how much?) of the eyeball?

Answer 2

Posterior part

5/6ths

Question 3

Sclera is the ___ of the eyeball.

Answer 3

White

Question 4

Anterior surface is covered by ___ and is connected to the sclera by___

Answer 4

Bulbar conjunctiva

Limbus

Question 5

The cornea is ___ and allows light to enter the eyeball

Answer 5

Transparent

Question 6

There are 5 layers of the cornea

Answer 6

Corneal epithelium
Basement membrane
Substantia propria 
Descemet’s membrane
Mesothelium

Question 7

Cornea is ___vascular, receives nourishment by diffusion of ___ from aqueous humore

Answer 7

A-vascular

Metabolites

Question 8

Scleral venous sinus is drained at the ___

Answer 8

Canal of Schlemm

Question 9

Blockage of canal of Schlemm can increase intraocular pressure aka ___

Answer 9

Glaucoma

Question 10

The choroid is part the ___ tunic and appears black due to ___

Answer 10

Vascular tunic

Melanin from melanocytes

Question 11

Large vessels near the sclera are ___

Answer 11

Vascular lamina

Question 12

Small vessels near the retina ___

Answer 12

Capillary lamina

Question 13

Epithelium of ___ secretes aqueous humor into the posterior chamber of the anterior cavity

Answer 13

Ciliary process

Question 14

Ciliary body suspends the less by ___ which are suspensory ligaments

Answer 14

Zonular fibers

Question 15

___ muscle controls tension of zonular fibers

Answer 15

Ciliary muscle

Question 16

___ accommodation allows ciliary muscles to relax and ___ accommodation causes ciliary muscle contraction

Answer 16

Far

Near

Question 17

Iris is the ___ portion of the ciliary body which divides the cornea and lens into anterior and posterior chambers.

Answer 17

Anterior

Question 18

Circular contraction of ___ is controlled by the parasympathetic system and causes constriction

Answer 18

Sphincter pupillae

Question 19

Radial ___ is controlled by the sympathetic system and causes dilation

Answer 19

Dilator pupillae

Question 20

Preganglionic cell bodies are located in the accessory occulomotor nucleus (aka ___) of the midbrain

Answer 20

Edinger-Wesphal

Question 21

Edinger-Wesptphal of midbrain =

Answer 21

Accessory Oculomotor nucleus

Question 22

Parasympathetic preganglionic fibers travel along ___ N and synapse in the ciliary ganglion

Answer 22

Oculomotor

Question 23

Parasympathetic postganglion cell bodies are located in the ___ in the orbit

Answer 23

Ciliary ganglion

Question 24

Sympathetic preganglionic neurons are located in upper ___ of spinal cord

Answer 24

Thoracic segments

Question 25

Sympathetic postganglionic neurons are located in ___ ganglion

Answer 25

Superior cervical

Question 26

Injury to CN III results in mydriasis =

Answer 26

Dilated pupils

Question 27

Injury to upper thoracic spinal cord or cervical sympathetic chain =

Answer 27

Horner’s syndrome

Question 28

Horner’s syndrome results in miosis= ___

Answer 28

Constricted pupil