Purpose

To compare refractive outcomes of eyes with flat keratometry (K) to matched controls after myopic laser in situ keratomileusis (LASIK).

Setting

Boston Eye Group, Brookline, Massachusetts, USA.

Design

Retrospective review.

Methods

Eyes that had LASIK between December 2008 and December 2018 were retrospectively analyzed and matched based on calculated postoperative flat K values. Stratified candidate subgroups (K < 38.0 diopters [D]) were compared with control subgroups (K ≥ 38.0 D).

Results

The study comprised 160 eyes (80 candidates and 80 controls). Statistical analyses showed no significant differences between candidates and controls in preoperative corrected distance visual acuity (CDVA) (P = .150) or postoperative CDVA (P = .290). There were no significant differences in the amount of tissue ablated between all candidate and control subgroups. Similarly, there was no significant change between preoperative and postoperative CDVA between the different candidate and respective subgroups. Three (3.75%) of 80 candidate eyes versus zero control eyes lost 1+ lines of CDVA after surgery. There was no difference in CDVA lost between these groups (P = .2453).

Conclusion

There is no increased risk for loss of CDVA after LASIK attributable to flat K.

中文翻译：

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较低的预测/计算术后角膜曲率对LASIK术后矫正远视力的影响

目的

为了比较近视激光原位角膜磨镶术（LASIK）后使用平角膜曲率计（K）与匹配的对照的眼睛的屈光结果。

设置

美国马萨诸塞州布鲁克林的波士顿眼集团。

设计

回顾性审查。

方法

回顾性分析2008年12月至2018年12月之间具有LASIK的眼睛，并根据计算出的术后Flat K值进行匹配。将分层的候选亚组（K <38.0屈光度[D]）与对照组（K≥38.0 D）进行比较。

结果

该研究包括160只眼睛（80位候选者和80位对照）。统计分析表明，候选人与对照组在术前校正远视力（CDVA）（P  = .150）或术后CDVA（P  = .290）之间无显着差异。在所有候选亚组和对照组亚组之间，消融的组织数量没有显着差异。同样，不同候选人与各亚组的术前和术后CDVA之间也没有显着变化。手术后，80只候选眼中有三只（3.75％）与零只对照眼丧失了1+行CDVA。这些组之间的CDVA损失没有差异（P  = 0.2453）。

结论

LASIK术后因K平坦而丧失CDVA的风险没有增加。