Ophthalmology · UKMLA & AKT
Periorbital cellulitis (preseptal cellulitis)
A free high-yield preview for the UKMLA Applied Knowledge Test, covering how to recognise this condition. The full SA Note notes add investigations, management and complications, with practice questions on this topic.
Key high-yield points
- Periorbital (preseptal) cellulitis = infection anterior to the orbital septum; the globe, extraocular muscles, and optic nerve are unaffected. The exam tests distinguishing this from orbital cellulitis.
Proptosis + restricted/painful eye movements + reduced visual acuity = orbital cellulitis until proven otherwise. This is a sight- and life-threatening emergency requiring urgent IV antibiotics and ophthalmology review.
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