Exam 4 Study Guide of the Eye Flashcards Preview

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Flashcards in Exam 4 Study Guide of the Eye Deck (53):
1

The range of the visible wavelength is

400-700 nm

2

They can respond to

Varying luminance
sensitivity of form
movement
distance

3

The functions or modalities of an eye include

Sensitivity to minute changes in luminosity
Dark-adapted scotopic vision
Discrimination of form
Discrimination of movement
Color in light-adapted photopic vision

4

The paired eyes can perform

Panoramic vision
Binocular vision
Stereoscopic vision

5

The lateral walls of the two orbits diverge at approximately ___ degrees

90

6

Name the mucous membrane which lines the inner surface of the eyelids

Palpebral conjunctiva

7

Name the fibrous tissues extends from the orbital margin to the eyelids to protect the orbital contents

Orbital septum

8

Name the bones which forms the superior wall or roof of the orbit

Orbital part of the frontal bone
Lesser wing of sphenoid

9

All of the following form the medial wall of the orbit except:
- ethmoid bone
- lacrimal bone
- sphenoid bone
- palatine bone

Palatine bone

10

Name the four bones which form the medial wall of the orbit

Ethmoid, lacrimal, sphenoid, frontal

11

Name the features which is located between the lateral and inferior orbital walls

Inferior orbital fissure

12

The apex of the orbit is in the ___ of ___ bone

Optic canal of sphenoid bone

13

Name the bones which form the base of the orbital margin

Frontal, zygomatic, maxillary

14

The periorbita is continuous with the dura mater through the ___ and ___

Optic canal and superior orbital fissure

15

Name the the transparent structures which is attached to the anterior surface of the eyeball

Bulbar conjunctiva

16

The conjunctival sac is the space bounded by the ___ and ___

Palpebral and bulbar conjunctiva

17

The palpebral portion of the orbicularis oculi is in the connective tissue between the ___ and ___

Tarsi and skin of eyelids

18

The tarsal glands are located in the superior and inferior ___

tarsi

19

The ciliary glands are located in the margin of ___

Eyelids

20

Name the enzyme which is bactericidal in the lacrimal fluid

Lysozyme

21

The orbital and palpebral parts of the lacrimal gland are divided by

The tendon of the levator palpebrae superioris

22

Name the entire pathway of the parasympathetic secretomotor nerve from the cranial nucleus to the lacrimal gland

Superior salivatory nucleus, Facial n, Genicular ganglion, Greater petrosal n, Zygomatic n of maxillary, Zygomaticotemporal, Lacrimal n of ophthalmic, Lacrimal gland

23

Name the entire pathway of the sympathetic postsynaptic motor nerve to the lacrimal gland

Superior cervical ganglion, Internal carotid n, Internal carotid plexus, Deep petrosal n, N of the pterygoid canal, Pterygopalatine ganglion, Zygomatic n of maxillary, Zygomaticotemporal, Lacrimal n of ophthalmic, Lacrimal gland

24

Name the structure which conveys the lacrimal fluid from the lacrimal sac to the inferior nasal meatus

Lacrimal ducts

25

The outer fibrous layer of the eyeball consists of ___ and ___

Sclera and cornea

26

Name the structure which covers the anterior one sixth of the eyeball

Cornea

27

The vascular layer of the eyeball is called

Uvea or uveal tract

28

The vascular layer of the eyeball consists of what 3 structures

Choroid, ciliary body, and iris

29

Within the choroid, larger vessels are located internally. true or false

True

30

Name the innermost layer of the choroid

Choricocapillaris

31

The ciliary body is connected anteriorly with ___ and posteriorly with ___

Iris
Choroid

32

The anterior chamber of the eye is the space between the ___ anteriorly and ___ posteriorly

Cornea
Iris and pupil

33

Sympathetic responses to the pupil are faster than the parasympathetic responses. true or false

False

34

Name the single layer of cells that reinforce the light-absorbing property of the choroid in reducing the scattering of light in the eyeball

Pigment cell layer

35

Name 2 features on the fundus of the eyeball

Optic disc and Fovea centralis

36

The optic disc is sensitive to color. true or false

False (insensitive to light)

37

Name the feature that is specialized for acuity of vision

Fovea centralis of macula lutea

38

The functional optic part of the retina terminates anteriorly along the

Ora serrata

39

Name the main artery that supplies the retina

Central artery of the retina of ophthalmic artery

40

Name the refractive media of the eyeball which pass through the light waves to the retina in order

Cornea, aqueous humor, lens, vitreous humor, and retina

41

The cornea is innervated by the ___

Long ciliary ganglion of Nasociliary N

42

Name two veins through which the aqueous humor is drained through the limbal plexus

Vorticose and anterior ciliary vein

43

The lens of the eye is anchored by the ___ to the ciliary body

Zonular fibers

44

Name the nerve which causes the near vision with the ciliary muscle constriction

Short ciliary n, parasympathetic

45

Name two main arteries which supply the eye

Ophthalmic A of Internal carotid A
Maxillary A of External carotid A

46

The central vein of the retina drains into the ___ or ___

Cavernous sinus or subophthalmic vein

47

The aqueous humor drains directly into the:
- sclera venous sinus
- limbal plexus
- vorticose veins
- anterior ciliary veins

Sclera venous sinus

48

The retinal detachment usually results from the fluid accumulation between ___ and ___ layers of the retina

Neural and pigment cell layers

49

The papilledema results from increases intracranial pressure through the subarachnoid space around the optic nerve. True or False

True

50

Horner syndrome results from interruption of

Cervical sympathetic trunk

51

The Horner syndrome includes all the following except:
- miosis
- ptosis
- vasodilation
- hydrosis

Hydrosis (should be anhydrosis)

52

The paralysis of the superior tarsal muscle may cause

Ptosis

53

The glaucoma is caused by decrease drainage of aqueous humor through

Sclera venous sinus