Ru Xin-Yu, Li Zheng-Ri, Li Cheng-Lin, Cui Hong, Deng Wen-Qing, Lin Shu-Hua, Jia Yu-Jie, Li Ying-Jun
Department of Ophthalmology, Affiliated Hospital of Yanbian University, Yanji 133000, Jilin Province, China.
J Ophthalmol. 2020 Oct 5;2020:9873504. doi: 10.1155/2020/9873504. eCollection 2020.
To analyze the distribution of the offset between the pupil center and the coaxially sighted corneal light reflex (), the effects of 50% and 100% angle kappa adjustments on refractive and visual quality in patients with moderate myopia were investigated.
A randomly selected 254 patients (254 eyes) with moderate myopia who underwent femtosecond laser-combined LASIK were examined. During the operation, the of the patients was recorded by the and y-axis eyeball-tracking adjustment program of the WaveLight Eagle Vision EX500 excimer laser system. Preoperatively and 3 months postoperatively, the WaveLight® ALLEGRO Topolyzer was used to measure the pupil size and center position, and the wavefront sensor was used to measure the wavefront aberrations. The visual function tester (OPTEC 6500) measured contrast sensitivity.
The average was 0.220 ± 0.102 mm. When the >0.220 mm, the postoperative residual cylinder was 0.29 ± 0.34 D in the group with the 50% adjustment and 0.40 ± 0.32 D in the 100% group, which was significantly higher than the 50% group (=0.036). The coma was 0.21 ± 0.17 m in the 50% adjusted group and 0.34 ± 0.25 m in the 100% group, which was significantly higher than that in the 50% group (=0.021). At the 1.5 c/d spatial frequency, contrast sensitivity in the adjusted 100% group was significantly lower than that in the 50% group under visual glare conditions (=0.039).
The postoperative visual acuity and spherical equivalent were not affected in the two groups. However, when t >0.220 mm, the residual astigmatism and coma were lower in the 50% group. Individualized operations for those with moderate myopia and large-angle kappa in which 100% adjustment is chosen may not result in a better visual quality effect than 50%.
分析瞳孔中心与同轴视轴角膜反光点（）之间偏移的分布情况，研究50%和100%角kappa调整对中度近视患者屈光和视觉质量的影响。
随机选取254例接受飞秒激光联合准分子原位角膜磨镶术（LASIK）的中度近视患者（254只眼）进行检查。手术过程中，通过威视鹰视EX500准分子激光系统的x轴和y轴眼球跟踪调整程序记录患者的。术前及术后3个月，使用威视® ALLEGRO Topolyzer测量瞳孔大小和中心位置，使用波前传感器测量波前像差。视觉功能测试仪（OPTEC 6500）测量对比敏感度。
平均为0.220±0.102mm。当>0.220mm时，50%调整组术后残余散光为0.29±0.34D，100%调整组为0.40±0.32D，显著高于50%调整组（P = 0.036）。50%调整组彗差为0.21±0.17μm，100%调整组为0.34±0.25μm，显著高于50%调整组（P = 0.021）。在1.5c/d空间频率下，在视觉眩光条件下，100%调整组的对比敏感度显著低于50%调整组（P = 0.039）。
两组术后视力和等效球镜度均未受影响。然而，当t>0.220mm时，50%调整组的残余散光和彗差较低。对于选择100%调整的中度近视和大角kappa患者进行个体化手术，其视觉质量效果可能并不优于50%调整。
