Toxic anterior segment syndrome (TASS)

Definition: Acute post surgical inflammation (non-infectious) due to toxic substance in the anterior chamber.

Clinical features: Usually present 1-2 days after surgery with corneal oedema (limbus to limbus), hypopyon, fibrin and raised IOP. No vitritis and respond well to topical steroids. Check for any retained lens material.

Monitor closely as high risk of corneal decompensation, glaucoma or cystoid macular oedema.

TIP: When unsure if it is TASS, treat as endophthalmitis.

Location Birmingham Midlands Eye Centre 76 Dudley Road Birmingham B18 7QH UK Phone 0121 554 3801 Hours Mr Ch'ng | Vitreoretinal Clinic Sessions: Monday: 8.30am - 12.30pm Wednesday (alternate): 8.30am - 5.00pm Thursday: 8.30am - 12.30pm Friday: 8.30am - 12.30pm | Vitreoretinal Theatre Sessions: Wednesday (alternate): 8.30am - 5.00pm & Friday (emergency cases): 1.30pm - 5.00pm | Eye Casualty Session: Monday 1.00pm - 4.30pm |
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