What does fluorescein dye allow you to see?
Areas of epithelial defect
(fluoresces green under blue light)
Which muscle commonly gets trapped in a blow-out fracture?
What is a hyphaema?
Fluid level of blood in the anterior chamber
What is the term given to a bruised retina?
What is Seidel's test used for?
To assess anterior chamber leakage after corneal laceration
How is Seidel's test performed?
Fluorescein strip is applied to affected area
- Examined with a cobalt blue filter
- Fluorescein appears green in color - changes in color or surface of the fluorescence area indicate the presence of corneal leakage.
- If fluorescein strip turns pale upon application to the corneal surface test is positive
- Change in the color of fluorescein strip is due to dilution of fluorescein caused by the aqueous leakage in the cornea.
What causes an "ice-rink" cornea?
Sub-tarsal foreign body
(continuously scratches the cornea)
Intra-ocular foreign bodies must be examined in which way?
X-ray (when looking up and down)
Which type of chemical burn is the worst?
Ischaemia at the limbus often presents with which clinical sign?
"China white" appearance
(due to no blood in vessels)
Which two things may create an alkali solution and continue damaging the eye upon irrigation?
Lime and cement
How is a chemical burn treated acutely?
Irrigation (at least 2l)