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What Is Cystoid Macular Oedema After Cataract Surgery?

2 min read

Cystoid macular oedema (CMO) is fluid build-up in the central retina after cataract or lens replacement surgery. Tiny blood vessels around the fovea become leaky, so fluid collects in cyst-like spaces within the retinal layers.¹

Patients may notice blurred or hazy central vision, reduced contrast or a disappointing “dip” in vision several weeks after an apparently smooth operation. Optical coherence tomography (OCT) shows characteristic pockets of fluid in the outer plexiform and inner nuclear layers.²

Many cases are mild and resolve with treatment, but untreated oedema can delay recovery and occasionally limit best-corrected vision.¹ CMO is usually driven by an inflammatory cascade rather than by “rough” surgical technique.

Understanding this mechanism allows us to design drop regimens and OCT follow-up that reduce the risk of clinically significant oedema and detect changes before they harm vision.

References

  1. Lobo C. Pseudophakic cystoid macular edema. Ophthalmologica. 2012;227(2):61-67.
  2. Gharbiya M, Grandinetti F, Scavella V, et al. Correlation between OCT measurement and fluorescein angiography in CMO. Invest Ophthalmol Vis Sci. 2007;48(9):3763-3770.

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About Blue Fin Vision®

Blue Fin Vision® is a GMC-registered, consultant-led ophthalmology clinic with CQC-regulated facilities across London, Hertfordshire, and Essex. Patient outcomes are independently audited by the National Ophthalmology Database, confirming exceptionally low complication rates.