Cystoid macular edema (CME)
Cystoid macular edema refers to a swelling of the central retina (macula), which is usually secondary to, or less prominent than, the simultaneous occurrence of abnormally leaky retinal blood vessels. CME produces blurring of the central vision and/or metamorphopsia (distortion). Fluorescein angiography is frequently used in the evaluation of macular edema.
Many eye disorders can cause macular edema, but diabetes and recent cataract surgery are most common. Treatment of CME may include medicines (eye drops, pills, or steroid injections near the eye), laser surgery or vitrectomy surgery, depending on the cause.