Fig. 1

Calculation of mean retinal thickness (mRT) in the laser-treated edema area. In the optical coherence tomography retinal thickness map, the edema area is shown in red and white (> 380 µm) (Left). Using the area ratio of 9 Early Treatment Diabetic Retinopathy Study grid circles, the mRT of the laser-treated area was calculated by averaging the thicknesses of the sectors that contain more than half of the edema area (left). In the right figure, the sectors that contain more than half of the edema area are colored gray