Ectropion & entropion Flashcards

1
Q

What is the definition of ectropion?

A

abnormal eversion of eyelid (away from globe)

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2
Q

what is the symptoms of ectropion?

A

Dry eyes and irritation

Epiphora (excessive lacrimation)

(1) punctum is turned out, out of contact with tear lake 🡪 cannot drain tears
(2) reflex tearing 2’ to irritation

FB sensation

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3
Q

what is the signs of ectropion?

A
  • Loss of lid-globe apposition w/ inferior scleral show

- Conjunctival injection

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4
Q

what are the investigations of ectropion?

A

fluorescein staining to check for epithelial defects 2’ exposure keratopathy

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5
Q

what are the causes of ectropion?

A
  • Age related (most common)
  • Cicatricial - scarring on lower eyelid skin causing outward traction, 2’ to prev Sx (e.g. xanthelasma excision)/chemical injury
  • Mechanical (e.g. masses pulling lower eyelid down)
  • Paralytic (e.g. CN7 palsy/facial nerve palsy – weak orbicularis oculi)
  • Congenital (imbalance in eyelid muscle tone)
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6
Q

what is the definition of entropion?

A

abnormal inversion of eyelid (towards globe), may be a/w inward rolling of lower eyelashes)

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7
Q

what are the symptoms of entropion?

A
  • Epiphora (excessive lacrimation)

- FB sensation

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8
Q

what are the signs of entropion?

A

Superficial punctate keratitis (2’ corneal abrasions) -> secondary keratitis (potentially sight threatening)

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9
Q

what are the causes of entropion?

A
  • Age related
  • Cicatricial (e.g. conjunctiva/fornix scarring secondary to SJS, acid injury)
  • Congenital
  • Blepharospasm (focal muscle dystonia)
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10
Q

what is the management of entropion?

A
  • Lubricants, ointments
  • Definitive Sx: horizontal tightening of lower lid w reattachment of lower lid retractors
  • Note: entropion is risk factor for endophthalmitis 🡪 must repair entropion before any eye surgery
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