Ocular trauma Flashcards Preview

AY Ophthalmology > Ocular trauma > Flashcards

Flashcards in Ocular trauma Deck (18):
1

How does a blow out fracture present?

Blunt force to the eye travels downwards
Tethering of inferior rectus muscle
Patient's can't look up

2

How would a globe rupture present?

Boggy haemorrhage under conjunctiva

3

How does traumatic uveitis usually present?

Red eye a couple days after trauma

4

What is hyphaema?

Blood in the anterior chamber

5

What are you able to see in a dislocated lens?

Zonular fibres

6

How does retinal detachment appear on fundoscopy?

Blood vessels appear twisted
Impression of folds on the retina
Fluid visible under retina

7

What is commotio retinae?

"Bruised retina"

8

Management of commotio retinae?

Tends to settle
Can leave vision reduced long term
Not much treatment avaliable

9

What is Siedel's test?

Used to assess the presence of anterior chamber fluid in the cornea - Used as a screening test for corneal disorders

10

What is the mechanism behind sympathetic ophthalmia?

Exposure of intra-ocular antigens in one eye causes autoimmune reaction in both eyes

11

What signs would suggest that a foreign body is penetrating?

Irregular pupil
Shallow anterior chamber
Localised cataract
Gross inflammation

12

Which has more of a rapid penetration acid or alkali?

Alkali

13

Features of alkali burn

Cicatrising changes to conjunctiva & cornea
PENETRATES THE INTRA-OCULAR STRUCTURES
lACK OF BLOOD VESSELS AT LIMBUS

14

Management of chemical injury

Irrigate ++++++
Then assess at slit lamp

15

Which chemicals should you be wary of when irrigating?

Lime/cement

16

Why might a patient with a blow out fracture present with malar region numbness?

Injury of inferior orbital nerve

17

`What is the most common type of blowout fracture?

Inferior

18

'Tear drop' sign

Fracture of inferior/medial wall of orbit