Blurring of central vision from cystoid macular edema results from accumulation of fluid with formation of fluid-filled cysts. It is non-specific as it may occur with any type of macular edema.
Diagnosis may be done through a detailed retinal examination by an eye doctor (either an ophthalmologist or a retina specialist). A fluorescein angiogram may be requested to confirm and identify possible source of fluid accumulation. An OCT may also be done to identify if a membrane may be pulling on the macula.
Treatment will depend of the cause. Causes include retinal vascular disease, inflammation, certain drugs (epinephrine, latanoprost, nicotinic acid), eye surgery, retinal dystrophies, epiretinal membrane and vitreous traction.
In some cases it is transient with recovery of central vision. However, when persistent, the cysts can combine to form larger spaces, resulting in permanent damage with little or no recovery of central vision. A visit to the eye doctor will greatly help in its detection and treatment.