Most of the preoperative baseline characteristics between the two groups were not significantly different. The anatomical success rates after primary surgery were 89.7% and 92.3% for the face-down group and the adjustable positioning group, respectively (P = 1.00). Best-corrected visual acuity at the 3-month postoperative visit was 0.74 ± 0.25 for the face-down group and 0.77 ± 0.36 for the adjustable positioning group, respectively (P = 0.41). The rates of complications were not statistically different in the two groups.