Kappa与Alpha角在白内障手术前后的变化分析

doi:10.6040/j.issn.1673-3770.0.2021.365

摘要/Abstract

摘要： 目的比较分析白内障患者术前与术后Kappa角及Alpha角的变化情况。方法回顾性分析2020年行白内障超声乳化摘除手术的患者101例(101眼),每例患者采用OPD-Scan Ⅲ测量术前与术后的Kappa角(PDist、MDist)、Alpha角(LDist)的大小及方向,术前的明视及暗视的瞳孔直径;术前的眼轴(AL)、平均曲率(Km)、前房深度(ACD)、晶体厚度(LT)等生物学参数均使用OA-2000测量。计算手术前后Kappa角、Alpha角的矢量均值(CentroidPDist、CentroidMDist、CentroidLDist)。使用配对t检验分析手术前后Kappa角、Alpha角之间的差异;通过Pearson分析各生物测量参数与手术前后Kappa角差值(DPDist、DMDist)及Alpha角差值(DLDist)之间、术前与术后Kappa角及Alpha角大小之间的相关性。结果术前PDist为(0.24±0.15)mm、MDist为(0.27±0.14)mm、LDist为(0.41±0.20)mm,术后PDist为(0.21±0.14)mm、MDist为(0.22±0.14)mm、LDist为(0.41±0.22)mm;手术前后PDist、MDist大小比较差异有统计学意义,术后的PDist、MDist小于术前;手术前后LDist大小比较无统计学差异。术前与术后PDist、MDist无明显相关性,手术前后LDist呈正相关; DPDist与LT呈正相关;DMDist与明视瞳孔直径、暗视瞳孔直径呈正相关,DLDist与年龄呈正相关。结论与Kappa角相比,Alpha角手术前后的大小及分布变化较小,且术前与术后正相关,术前使用Alpha角评估更具有可靠性;但术前裸眼视力差或瞳孔偏大的患者可能导致术后Kappa角及Alpha角发生较大的大小变化,评估可靠性下降。

关键词: Kappa角, Alpha角, 矢量分析

Abstract: Objective To compare and analyze the changes of kappa angle and alpha angle in patients before and after cataract surgery. Methods 101 patients who underwent phacoemulsification in our hospital in 2020 were analyzed retrospectively. OPD scan Ⅲ was used to measure the size and direction of kappa angle(PDist、 MDist)and alpha angle(LDist)before and after the surgery. The pupil diameter of bright and dark environment were also measured by OPD scan Ⅲ. Preoperative biological parameters such as axial(AL), mean keratometry(Km), anterior chamber depth(ACD)and lens thickness(LT)were measured by OA-2000. The centroid kappa angle and centroid alpha angle before and after surgery were calculated. Paired sample t-test was used to analyze the difference of kappa angle and alpha angle before and after surgery. The correlation of preoperative kappa angle, postoperative kappa angle, preoperative alpha angle, postoperative alpha angle was analyzed by pearson correlations, and the correlation of pupil diameter, AL, Km, ACD, LT, DPDist, DMDist, DLDist was analyzed by pearson correlations. Results The preoperative PDist was(0.24±0.15)mm, the preoperative MDist was(0.27±0.14)mm, the preoperative LDist was(0.41±0.20)mm. The postoperative PDist was(0.21±0.14)mm, the postoperative MDist was(0.22±0.14)mm, the postoperative LDist was(0.41±0.22)mm. There was significant difference in PDist and MDist before and after surgery. PDist and MDist were decreased after surgery. There was no significant difference in LDist before and after surgery. There was no significant correlation between PDist and MDist before and after surgery. Postoperative LDist was positively correlated with preoperative LDist.DPDist was positively correlated with LT. DMDist was positively correlated with bright pupil diameter and dark pupil diameter. DLDist was positively correlated with age. Conclusion There was no significant change in the size and distribution of alpha angle before and after surgery,and was a positive correlation between preoperative and postoperative alpha angle. Compared with kappa angle, preoperative alpha angle evaluation is more reliable. However, patients with poor uncorrected visual acuity or abnormal pupil diameter before the surgery may cause large changes in kappa angle and alpha angle after surgery.

Key words: Kappa Angle, Alpha Angle, Vector analysis

中图分类号:

R776

胡颖峰,贾玉叶,王艳,张嵘,王峥,叶向彧. Kappa与Alpha角在白内障手术前后的变化分析[J]. 山东大学耳鼻喉眼学报, 2022, 36(2): 83-89.

HU Yingfeng, JIA Yuye, WANG Yan, ZHANG Rong, WANG Zheng, YE Xiangyu. Changes of kappa angle and alpha angle before and after cataract surgery[J]. Journal of Otolaryngology and Ophthalmology of Shandong University, 2022, 36(2): 83-89.

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