Cystoid macular edema (CME) is a swelling of the central macula caused by a settling of fluid within the various layers of the retina. CME can be caused by disease, injury to the eye, or any type of eye surgery. This settling of fluid causes blurry and sometimes distorted central vision. While the effects of CME rarely cause permanent vision loss, the recovery period can last anywhere from 2 to 15 months.

Signs and Symptoms
blurred vision, distorted vision
straight lines appear wavy
may be sensitive to light

Diagnosis
Diagnosis of CME is very difficult to detect during a normal fundus exam. A diagnosis of CME is usually based upon a fluorescein angiogram dye study or an optical coherence tomogram.

Treatment
The first approach normally used for CME are anti-inflammatory eye drops. Ocassionally intraocular injections of steroids may be performed or even vitrectomy surgery. Oral medications can also be perscribed.

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