BACKGROUND To investigate the accuracy of preoperative biometry in eyes undergoing combined phacovitrectomy and to compare it with eyes having cataract surgery at a later point in time following vitrectomy. METHODS Patients with epiretinal membrane or macular hole who underwent combined phacovitrectomy (group 1) or phacoemulsification following pars plana vitrectomy (PPV) (group 2) were included in this retrospective, comparative, interventional case series. The primary outcome measures were the intraocular lens power prediction error (PE) and the percentage of eyes with PE > ± 0.5D in the two groups. Secondary outcome measures included the correlation between epidemiological, clinical, or surgical factors and dioptric shift. In addition, the influence of optical coherence tomography characteristics to the PE was investigated. RESULTS Group 1 and 2 consisted of 55 and 54 eyes, respectively, for a total of 109 eyes included in the study. The mean absolute PE was 0.59 D (range + 1.4 to - 2.5D) in group 1 and 0.35 (range + 1.0 to - 1.45D) in group 2 (p = 0.01). PE greater than 0.5D was observed in 47% of eyes in group 1 as opposed to 16.6% of eyes in group 2 (p = 0.027). The PE was associated with shallower anterior chamber depth (ACD), increased central macular thickness (> 300 μ), and worse baseline best-corrected visual acuity. Photoreceptor ellipsoid zone or external limiting membrane disruption was not associated with significantly greater postoperative refractive deviations. CONCLUSION Combined phacovitrectomy may result in greater postoperative refractive prediction error compared to phacoemulsification alone following vitrectomy. Patients with worse vision, greater central macular thickness, and shallow anterior chambers require more caution since they are prone to inaccurate preoperative biometry.

中文翻译：

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玻璃体切除术后联合白内障摘除术与白内障手术的眼睛术后屈光结果的比较。

背景技术研究在进行联合白内障摘除术的眼睛中进行术前生物测定的准确性，并将其与在玻璃体切除术之后进行白内障手术的眼睛进行比较。方法这项回顾性，比较性，介入性病例系列研究包括了接受联合晶状体玻璃体切除术（第1组）或经晶状体玻璃体切除术（PPV）（第2组）进行超声乳化术的视网膜前膜或黄斑裂孔患者。两组的主要结局指标是人工晶状体屈光力预测误差（PE）和PE>±0.5D的眼睛百分比。次要结果指标包括流行病学，临床或手术因素与屈光度变化之间的相关性。另外，研究了光学相干断层扫描特性对PE的影响。结果第1组和第2组分别由55只和54只眼组成，总共109只眼被纳入研究。第1组的平均绝对PE为0.59 D（范围+ 1.4至-2.5D），第2组的平均绝对PE为0.35（范围+ 1.0至-1.45D）（p = 0.01）。在第1组中，有47％的眼睛观察到PE大于0.5D，而在第2组中，则有16.6％的PE（p = 0.027）。PE与较浅的前房深度（ACD），中央黄斑中心厚度增加（> 300μ）和较差的基线最佳矫正视力有关。感光器椭球区或外部限制膜破坏与术后更大的屈光不正无关。结论与玻璃体切除术后单独进行超声乳化相比，联合晶状体玻璃体切除术可能导致更大的术后屈光预测误差。视力较差的患者