Liu R, et al. - Researchers conducted this retrospective study to observe the changes in ocular biometric measurements after vitrectomy with silicone oil tamponade for rhegmatogenous retinal detachment (RRD) repair. Sixty-three phakic, macula-off RRD eyes underwent vitrectomy with silicone oil tamponade but not lens extraction have been involved. Measurements of axial length (AL), anterior chamber depth (ACD), lens thickness (LT) utilizing the new Zeiss IOLMaster 700 and derivative lens position (LP), relative lens position (RLP) and lens-retina distance (LRD) were analyzed and contrasted between preoperative and postoperative in phakic, macula-off eyes with RRD. Data reported that preoperative AL, ACD, LT, LP, RLP and LRD were 24.94 ± 1.82 mm, 3.45 ± 0.42 mm, 4.34 ± 0.16 mm, 5.55 ± 0.41 mm, 0.22 ± 0.01 and 19.52 ± 1.82 mm. Underestimation of AL and anterior shifting of the lens in phakic, macula-off eyes with RRD following vitrectomy with silicone oil tamponade.