Fig. 3

Left eye of a Chinese patient (60–70 years old) with a macular hole (MH) treated by pars plana vitrectomy with ILM peeling. (left) Preoperative; (right) Postoperative; The examiner was asked to fix the fixation target to the central of MHs as much as possible. Follow-up pattern was used to ensure the selected dots located on the same position whether in preoperative or in postoperative examination. When calculating, we only choose 28 points in the outer ring zone (between the two black circles) instead of all 45 points, which located in the normal retina, and the area covered by MH was excluded