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Opthalmology > LE 1 > Flashcards

LE 1 Flashcards

1
Q

What are the bones that make up the orbit:

A

Roof : front - less
Lateral : the great - Z
Medial : Smel (l)
Floor : zip my pants

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2
Q

Contains the lacrimal gland fossa

A

Orbital plate of the frontal bone

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3
Q

Contains the optical canal

A

Lesser wing of the sphenoid

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4
Q

Serves as the pulley of superior oblique

A

Fovea trochlearis

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5
Q

Distance of fovea trochlearis from the orbital margin

A

4mm

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6
Q

Paper thin medial wall

A

Lamina papyracea

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7
Q

Components of the medial orbital wall

A

Lesser wing of Sphenoid , Maxillary , Ethmoid, Lacrimal

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8
Q

This is the thickest and strongest part of the orbit

A

Lateral wall

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9
Q

Components of the lateral

A

The GREAT wing of sphenoid, Zygomatic

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10
Q

What are the ligaments that attach to the lateral orbital tubercle:

A 
Mnemonic: PAl CHECK our SUSPENDED APO
lateral PALpebral ligament
Check ligament of the LR
Suspensory ligament of the eye ball
Aponeurosis of the levator ligament
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11
Q

Made up of 3 bones?

A

Floor - ZIP MY PANTS and push me to the floor

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12
Q

Damage to this bone produces a Blow out fracture

A

Maxillary bone

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13
Q

Contains the infraoribtal formamen

A

Floor

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14
Q

Which part of the orbit does the only muscle which arises from the floor

A

Floor - inferior oblique muscle

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15
Q

Volume of orbit

A

30cc

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16
Q

Entry portal of ALL nerves and vessels

A

Orbital apex

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17
Q

Site of origin of ALL eoms except IOM

A

Annulus of zinn

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18
Q

Where does the ophtalmoc artery branc put!

A

Intracranial ICA

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19
Q

This is the first major branch of the intracranial ICA

A

Opthalmic artery

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20
Q

Enters the optic nerve 8-15mm behind the globe

A

Central retinal artery

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21
Q

Supplies upper eyelids and lacrimal gland

A

Lacrimal artery

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22
Q

Supplies the eyelids

A

Medial palpebral arteriese

23
Q

Pathway venous drainage in the orbit

A

VAC-SI-CS

24
Q

What re the external ocular structures

A

Eyelids
Conjunctiva - lines the inside of the eyelids and covers the eyes
Sclera - white part of the eyeball
Limbus - junction
Cornea - transparent layer covering the front of the eye
Lacrimal apparatus

25
Q

Outer structure that protects and lubricates the eye with the help of the meibonian gland (wi tarsus)

A

Eye lid

26
Q

T or f : eyelids covers about 2 mm of sup. limbus

A

T

27
Q

T or F : lower eyelid is not at the level of the limbus

A

F

28
Q

Exposed zone between the upper and lower eyelids

A

Interpalpebral fissure

29
Q

Normal size of the interpalpebral fissure

A

27 mm long, 8-11 mm wide

30
Q

T or F : the lower eyelid is more mobile, FF up ehat diatance can it be moved..

A

False. The upper eyelid is more moveable and it can be raised up to 15 mm

31
Q

Thinnest skin in the body

A

Skin of the eyelid

32
Q

Eyefold is due to what?

A

Insertion of levator aponeuorsis

33
Q

Where does the eyelashes arise from?

A

Anterior portion of the eyelid

34
Q

Responsible for voluntary control of the eye

A

Orbital of the orbicularis oculi

35
Q

If relfex and voluntary action of the palpebra

A

Palpebral part of orbicularis oculi

36
Q

This provides a barrier to spread of blood or inflammation or infection

A

Orbital septum

37
Q

This muscle elevates the eyelids and is innervated by cranial nerve 3

A

Superior tarsus muscle or muellers muscle

38
Q

This structure is analogous to the nictating membrane of lower animals

A

Plica semilunaris

39
Q

Vascular supply of conjunctiva

A

Anterior ciliary artery

40
Q

Blood supply of the

A

Lacrimal artery

41
Q

Junction between the cornea and sclera

A

Limbus

42
Q

Bilateral condition manifesting as a white ring in the periphery of the cornea

A

Arcus senilis

43
Q

This is the space between the cornea and the iris

A

Anterior chamber

44
Q

Middle, vascular layer of the eye, contributes to the blood of the retina

A

Uveal tract

45
Q

The uveal tract is composed of the following

A

Iris
ciliary body
choroid

46
Q

Colored part of the eye , pigmented posterior surface

A

Iris

47
Q

Blood supply of the iris

A

Major circle of the iris

48
Q

Sensory innervation of the iris

A

Ciliary nerves

49
Q

Circular opening of the iris

A

Pupil

50
Q

Structure of the eye that produces aq humour

A

Ciliary body

51
Q

This structure provides the blood supply to the outer retinal layer

A

Choroid

52
Q

Volume of the vitreous cavity

A

4.5cc

53
Q

Responsible for fine vision

A

Macula

54
Q

Blood supply of the optic nerve

A

Circle of zinn haller

Opthalmology (1 decks)

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