Optical Coherence Tomography Useful for Macular Edema

In patients with diabetic macular edema, visual acuity (VA) correlates with the magnitude of change in central macular thickness (CMT). The strongest correlation with VA is the absolute and relative change in CMT from baseline to the first laser photocoagulation. CMT taken at a single time point is not as strongly correlated with CMT.

Diabetic macular edema is the leading cause of vision loss among patients with diabetes. Prevalence estimates of macular edema in patients with diabetes range from 2-10%. The response of macular edema to treatment varies.

Overall, 73.9% of patients with diabetic macular edema had an OCT type 1 pattern of diffuse retinal swelling. The type 1 pattern correlated better with VA than the type 2 pattern.

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