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Infectious crystalline keratopathy (ICK) is a rare, progressive microbial infection characterised by branching, intrastromal crystalline opacities and minimal ocular inflammation. Predisposing factors most commonly include topical corticosteroids, previous corneal surgery, herpetic keratitis, neurotrophic keratopathy, and topical anaesthetic abuse.1–3 We describe a patient who developed ICK following intravitreal and posterior sub-Tenon (PST) triamcinolone acetonide injections despite being off topical corticosteroids for 6 months.
A 75 year old man with diabetes mellitus developed cystoid macular oedema (CMO) in the left eye following cataract extraction complicated by anterior vitrectomy, anterior chamber intraocular lens placement (ACIOL) and subsequent ACIOL exchange. The CMO resolved with topical prednisolone acetate 1% and a posterior sub-Tenon injection (PST) of triamcinolone acetonide (40 mg). After being off topical corticosteroids for 6 months, the CMO recurred and …