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Opthalmology > Eyelids > Flashcards

Eyelids Flashcards

1
Q

Upper eyelid covers ____ mm of cornea

A

2 mm

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2
Q

Lower eyelid covers ____ mm of cornea

A

0

It touches the limbus

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3
Q

Layers of eyelid

A 
Skin 
Subcutaneous tissue
Striated muscles 
  -LP
  -orbicularis oculi 
Sub muscular are areolar tissue
    -blood vessels and nerves
Fibrous skeleton 
Tarsus 
Orbital septum
Smooth muscles (muller)
Conjunctiva (palpebral)
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4
Q

Origin of LPS

A

Orbital apex

Lesser wing of sphenoid

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5
Q

Insertion of LPS

A

Anterior tarsus

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6
Q

Nerve supply of LPS

A

CN 3

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7
Q

Normal elevation of eyelid (by LPS) in mm

A

> 15 mm

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8
Q

Congenital ptosis main features

A

LPS dystrophy
Absence if lid crease
Lid lag sign positive

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9
Q

Acquired ptosis causes

A

Neurogenic ptosis
Myogenic
Mechanical

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10
Q

Amount of ptosis

Classification

A

Mild - <= 2 mm
Moderate- 3 mm
Severe - >= 4 mm

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11
Q

Diameter of cornea

A

12 mm

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12
Q

Marginal reflex distance 1

A

Distance between upper eyelid to pupil

4 mm- normal

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13
Q

Marginal reflex distance 2

A

Pupil to lower eyelid

Normal - 6 mm

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14
Q

Everbusch procedure

A

LPS resection through skin approach for ptosis

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15
Q

Treatment of acquired ptosis

A

Treat underlying cause

Mild ptosis-
Fasanella servat operation
Mullerectomy

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16
Q

Treatment of congenital ptosis (mild,moderate,severe)

A

Mild- LPS plication
Moderate-LPS resection (frontalis sling operation)
Severe- LPS replacement

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17
Q

Marcus Gunn jaw winking phenomenon due to

A

Abnormal 5th nerve between pterygoid syndrome and LPS

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18
Q

Crocodile tears in Marcus Gunn jwp why?

A

Abnormal 7th nerve

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19
Q

Marcys Gunn jwp treatment

A

LPS disinsertion from tarsus + frontalis sling

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20
Q

BPE syndrome full form

A

Blepharophimosis
Ptosis
Epicanthus inversus

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21
Q

Pseudo-ptosis causes (4)

A

Enopthalmos
C/L lid retraction
Brow ptosis
Blepharochalasis

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22
Q

Parts of orbicularis oculi

A

Orbitalis
Palpebral
Lacrimal

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23
Q

Spontaneous blinking by which part (muscle)

A

Pretarsal orbicularis oculi

24
Q 
Voluntary blinking 
Which part (muscle)
A

Preseptal orbicularis oculi

25
Q

Forceful closure

Which part muscle

A

Orbitalis orbicularis oculi

26
Q

Bells phenomenon

A

Upward and outward rolling of eyes

Normal

27
Q

Cogan’s lid twitch

A

Ocular myasthenia

28
Q

Curtain sign

A

Ocular myasthenia

29
Q

Signs NOT present in ocular myasthenia

A 
NO
Pain
Proptosis 
Pupil involvement 
Paraesthesia
Perception
30
Q

Colomboma

A

Loss of eyelids

31
Q

Poliosis

A

Whitening of eyelashes

32
Q

Causes of poliosis

A

Vitiligo

Vogt kayanagi harada

33
Q

Madarosis

A

Absence of eyelashes

34
Q

Causes of madarosis

A

Leprosy

Blepharitis

35
Q

Ankyloblepharon

A

Adhesion between upper and lower eyelids

36
Q

Symblepharon

A

Adhesion between bulbar and palpebral conjunctiva

37
Q

Causes of symblepharon

A

Chemical injuries

Severe dry eyes

38
Q

Tylosis

A

Thick eyelid margins

39
Q

Distichiasis

A

Extra row of eyelashes

40
Q

Trichiasis

A

Misdirection of eyelashes

41
Q

Entropion

A

Eyelid turned in

42
Q

Ectropion

A

Eyelid turned out

43
Q

Senile entropion treatment (4)

1 imp

A

Jones
Weiss
Quickert
Wheeler

44
Q

MCC of entropion

A

Senile

45
Q

Causes of entropion

A

Senile
Cicatricial
Spastic
Congenital

46
Q

Treatment if cicatricial entropion

A

Tarsal wedge resection

47
Q

Congenital entropion treatment

A

Holtz

48
Q

MCC of ectropion

A

Involutional / senile

49
Q

Types of ectropion

A 
Senile 
Cicatricial
Paralytic 
Mechanical
Congenital
50
Q

Treatment of senile ectropion

A

Medial conjunctivoplasty
Pentagon excision
Byron smith
Kahn’s szymanowski

51
Q

Tear film layers

A 
AIR
Lipid 
Aqueous (thickest)
Mucus 
CORNEA
52
Q

Chalazion

A

Meibomian gland is blocked

Lipgranulamatous inflammation

53
Q

MCC of chalazion

A

Eyelid rubbing

54
Q

Internal hordeolum

A

Infected chalazion

55
Q

External hordeolum

A

Infection of hair follicle&raquo_space; zeiss

Opthalmology (10 decks)

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