Ocular trauma

Question 1

Fluorescein drops - function

Answer 1

Orange dye which is taken up by any area of epithelial defect (ulcer, abrasion, foreign body)
When you shine a blue light on the eye, the area of epithelial loss shows up green

Question 2

Blowout fracture - which orbital wall is usually affected? and what does this result in?

Answer 2

Inferior orbital wall

- fat prolapse through the orbital floor and into the sinus below

Question 3

Blowout fracture - which extra ocular muscle is most commonly affected? and what eye feature does the patient show?

Answer 3

Inferior rectus
- loss of upward gaze (even though IR usually depresses the eye, if it is entrapped then the SR can’t manage to pull the eye up)

Question 4

Hyphaema

Answer 4

Fluid level of blood in the anterior chamber

This is a significant sign of intraocular injury

Question 5

Hyponon

Answer 5

Fluid level of white inflammatory cells in the anterior chamber

Question 6

Retinal detachment

Answer 6

This occurs due to a build up of fluid under the retina

Question 7

Commotio retinae

Answer 7

Bruised retinae

Question 8

Chemical burns - which is more aggressive: acid or alkali?

Answer 8

Alkali

- there is rapid penetration through the ocular surface

Question 9

Management of chemical burns

Answer 9

Thorough irrigation immediately