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Comparison of detection of ellipsoid zone (EZ) defect area between the automated algorithm and manual grading on ratio image. The top row shows the ratio images. The second row shows the manual grading results. Annular regions with EZ defect (red) were differentiated from regions with healthy EZ (green). The bottom row shows the EZ defect area extracted by the fuzzy logic algorithm. DR – Diabetic retinopathy.
