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Full title: Epiretinal membrane and acute Pseudophakic cystoid macular oedema: A prospective multi-centre observational study of Implications and treatment outComes (EPIC)
Summary: Epiretinal membrane and acute Pseudophakic cystoid macular oedema: A prospective multi-centre observational study of Implications and treatment outComes (EPIC)
Cataract surgery is the most frequently performed surgery in the NHS. Cystoid macular oedema (CMO, inflammation and fluid accumulation in the central retina) is the most common visually significant complication following cataract surgery occurring in 1-2% of cases. Many cases resolve with topical anti-inflammatory eye drops. However some cases do not respond and require more invasive treatment modalities eg injections into the eye. If CMO remains persistent this can lead to permanent visual loss. There is little current knowledge on what factors lead to persistence in some cases compared to others. Epiretinal membrane (ERM, a fibrocellular membrane that can form on the inner retina) can be associated with a similar cystoid macular oedema that often does not resolve until the ERM is removed surgically. This study aims to look at whether the presence of an ERM affects how long it takes for cystoid macular oedema to resolve following cataract surgery and the requirement for non-topical treatment modalities.
A prospective, non-interventional, observational study design is proposed. Eligible participants would be identified at one of several participating NHS hospitals in the Wessex Deanery. Subjects with evidence of CMO post-cataract surgery and commenced on treatment would be included. Treatment choice is at the discretion of the reviewing clinician and independent of the study protocol. Investigations performed would be only those conducted as part of standard care. Presence of epiretinal membrane would be determined from review of the medical records. Case-records of eligible participants would be reviewed over a 12-month period to assess response to treatment and type of treatment(s) used. Based on current surgical data recruitment would be estimated to take 18 months to achieve the 165 eligible participants to achieve statistical power.
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