What is Cystoid Macular Oedema?

Cystoid Macular Oedema (CM) is a condition that affects the macula, a crucial part of the eye responsible for sharp, central vision. The macula is located in the middle of the retina and so anything which affects the macular is likely to affect your central vision. In CMEO, fluid accumulates in the macula either below the layers of the retina or in between them, causing it to swell and form cyst-like spaces. This may cause distortion in your central vision or a general drop in vision.

What causes Cystoid Macular Oedema?

CMO can be associated and caused by various eye conditions, including:

  • Diabetic retinopathy
  • Age-related macular degeneration
  • Uveitis (inflammation in the eye)
  • Retinal vein occlusion
  • Post-cataract surgery
  • Post-Vitreoretinal surgery

What are the usual symptoms of Cystoid Macular Oedema?

If you are experiencing CMO, you may notice:

  • Blurred or distorted central vision
  • Colours appearing less vibrant
  • Difficulty reading or recognising faces

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