Transient and painless loss of vision in one eye.
- Common clinical symptom of transient retinal ischaemia.
- It can have a number of aetiologies but most commonly are cardiovascular.
- Carotid bifurcation thromboembolism
- Cardiac emboli (e.g. mural, valvular)
- Drug abuse-related vascular emboli
- Inflammatory arteritides
- Hypoperfusion (e.g. cardiac failure, systemic diseases affected blood viscosity)
- Rapid onset of unilateral visual loss (10-15 seconds)
- ‘Window-curtain’ development i.e. like a curtain being pulled over their eye
- Lasting seconds-minutes
- Clears slowly in the reverse direction from lost
- It is important to evaluate for signs of TIA/stroke as well, e.g. hemiplegia/weakness, because patients will often be at risk of these events too.
- FBC, ESR/PV may be done; may also want to do clotting/INR; ?lipid profile
- Fluorescein angiography may help identify ophthalmic pathology
- If thromboembolic, consider low-dose aspirin +/- statin