Flashcards in Ocular Trauma Deck (26)
List the logical order to examine the eye for signs of ocular trauma
How do fluorescein drops help with examining the eye?
Identify areas of epithelial loss - absorb light of one wavelength and emit light of another wavelength
What is necessary to document when assessing ocular trauma?
How do orbital blowout fractures occur?
Direct blow to orbit causes increased intraorbital fracture, leading to fracture of orbital wall (usually inferior)
List signs of an orbital blowout fracture
Diplopia (damage to inferior rectus)
What is the main imaging done for orbital blowout fractures?
List potential causes of subconjunctival haemorrhage
How does subconjunctival haemorrhage usually present?
Unilateral red eye with mild irritation
Examination usually normal
What is a corneal abrasion?
Disruption in corneal epithelium
List causes of corneal abrasion
Trauma (fingernail, brush, particle)
Contact lens irritation
Ocular foreign body
List symptoms + signs of corneal abrasion
Redness, injected vessels
What is traumatic uveitis?
Inflammation of iris due to trauma which causes necrosis
List early symptoms + signs of traumatic uveitis
Decreased visual acuity
What is hyphema?
Accumulation of red blood cells within anterior chamber of the eye, a sign of severe intra-ocular trauma
Retinal detachment is an emergency. True/False?
How does retinal detachment arise?
Subretinal fluid accumulates between the neurosensory retina and retinal pigment epithelium
What are the signs and symptoms of retinal detachment?
Sudden flashes of light
In optic nerve avulsion, the eye is untreatable and blindness will definitely occur. True/False?
Which connective tissue disease is associated with a dislocated lens?
Marfan's syndrome (or any ligamentous laxity -associated CTD)
What happens in sympathetic opththalmia?
Penetrating to one eye causes bilateral inflammation and potential blindness in both eyes
How does corneal laceration usually arise?
Something sharp flying into/striking eye (fishhook, metal)
Explain Siedel's test for corneal laceration
Apply fluorescein dye; if it appears diluted then there is likely to be a leak (positive test)
If you suspect an intra-ocular foreign body, what investigation is done?
Which type of chemical burn in the eye is worse - acid or alkali - and why?
Scarring changes to conjunctiva + cornea
Chemical burn is the only eye injury that needs treatment prior to history taking or examination. True/False?