Assia Ehud I, Wong John X H, Shochot Yoram
Ein-Tal Eye Center, Tel Aviv, Israel.
Center for Applied Eye Research, Department of Ophthalmology, Meir Medical Center, Affiliated with the Sackler School of Medicine, Tel Aviv University, Kfar Saba, Israel.
Clin Ophthalmol. 2020 Oct 23;14:3475-3480. doi: 10.2147/OPTH.S254152. eCollection 2020.
To determine if intraoperative manual centration of the intraocular lens (IOL) during cataract surgery results in better early post-operative centration. It is common practice for cataract surgeons to align intraocular lens centration to the visual axis by manual intraoperative manipulation of the intraocular lens. We aim to compare post-operative intraocular lens centration between intraocular lenses that were allowed spontaneous positioning in the capsular bag and IOLs that were manually centred during implantation.
One hundred and twenty-five consecutive eyes that underwent either femtosecond laser-assisted cataract surgery (FLACS) or phacoemulsification and IOL (monofocal/toric/multifocal) implantation by a single surgeon were included. Post-operative IOL centration at 4 weeks was assessed and measured on a slit-lamp by a masked observer.
A total of 17 (13.6%) IOLs were off-centered to some extent at 4 weeks post-operatively. All the decentered IOLs were graded as minimal or mild (<0.5mm) decentration. There was no statistically significant difference in the proportion of decentered IOLs between the manual centration group and non-centration group (p = 0.59).
The final position of the IOL is not dependent on manual centration but rather on the design and symmetry of the IOL, as well as the integrity of the capsular bag.
确定白内障手术中人工手动对眼内晶状体（IOL）进行中心定位是否能在术后早期获得更好的中心定位效果。白内障手术医生通过术中手动操作眼内晶状体使其中心与视轴对齐是常见的做法。我们旨在比较在囊袋中自然定位的眼内晶状体与植入过程中人工中心定位的眼内晶状体术后的中心定位情况。
纳入由同一位外科医生进行的连续125只接受飞秒激光辅助白内障手术（FLACS）或超声乳化白内障吸除联合IOL（单焦点/散光/多焦点）植入术的眼睛。术后4周时，由一位不知情的观察者在裂隙灯上评估并测量IOL的中心定位情况。
术后4周时，共有17只（13.6%）IOL出现了一定程度的偏心。所有偏心的IOL均被评为轻度或中度偏心（<0.5mm）。人工中心定位组与非中心定位组之间偏心IOL的比例无统计学显著差异（p = 0.59）。
IOL的最终位置不依赖于人工中心定位，而是取决于IOL的设计和对称性以及囊袋的完整性。
