光相干生物测量仪与接触式A型超声测量特发性黄斑裂孔患者眼轴长度的比较

摘要

Objective To compare the axial length (AL) measured by Lenstar and contact A-Scan in the patients with idiopathic macular hole and study the correlation between the difference of the two measurements and the foveal thickness measured by optical coherence tomography (OCT).Methods Twenty-seven eyes of 26 idiopathic macular hole patients (IMH group) and 27 eyes of 25 patients with mild cataract (control group) were enrolled in this study.Foveal thickness was measured with 3D OCT.The AL was measured by Lenstar and contact A-Scan,and the consistency of the two measurements was determined by Bland Altman analysis.The correlation between the difference of the two measurements and foveal thickness was analyzed by Pearson correlation analysis.Results Mean foveal thickness of IMH and control eyes were (372.85±60.02) μm and (243.44±22.50) μm,respectively.The difference between the foveal thickness of the two groups was highly significant (t=-10.490,P＜0.001).In the IMH group,the AL measured by Lenstar and contact A-Scan were (23.20± 1.12) mm and (23.18± 1.13) mm,respectively,the difference between the two measurements was not statistically significant (t =-0.549,P =0.588),whereas in the control group,the AL was (23.41 ± 0.72) mm by Lenstar and (23.33 ± 0.74) mm by contact A-Scan,the two measurements were significantly different (t=-4.832,P＜0.001).However,no correlation was found by Pearson correlation analysis between the difference of the two measurements and the foveal thickness in either IMH or control group (r=0.181,-0.141; P＞0.05).Conclusions Although there is no difference of axial length measurements using Lenstar and contact A-Scan in IMH eyes,in clinical measurements the results of two instruments should be taken into comprehensive consideration.%目的 对比观察光相干生物测量仪(Lenstar)与接触式A型超声测量特发性黄斑裂孔患者眼轴长度的差异,探讨眼轴测量差值与黄斑中心凹厚度的相关性.方法 手术治疗的特发性黄斑裂孔患者26例27只眼(病例组)和同期行单纯白内障摘除人工晶状体植人手术的患者25例27只眼(对照组)纳入研究.三维光相干断层扫描(3D OCT)仪测量所有患者黄斑中心凹厚度；Lenstar和接触式A型超声测量其眼轴长度；Bland-Altman法分析2种眼轴测量方法的一致性；Pearson相关分析2种眼轴测量方法差值与黄斑中心凹厚度的相关性.结果 3D OCT检查结果显示,病例组、对照组平均黄斑中心凹厚度分别为(372.85±60.02)、(243.44±22.50) μm;2组平均黄斑中心凹厚度比较,差异有统计学意义(t=-10.490,P＜0.001).Lenstar和触式A型超声测量结果显示,病例组平均眼轴长度分别为(23.20±1.12)、(23.18±1.13) mm,差异无统计学意义(t=-0.549,P=0.588)；对照组平均眼轴长度分别为(23.41±0.72)、(23.33±0.74) mm,差异有统计学意义(t=-4.832,P＜0.001).Pearson相关分析结果显示,病例组和对照组2种测量方法测量差值与黄斑中心凹厚度均无相关性(r=0.181、-0.141,P＞0.05).结论 Lenstar和接触式A型超声测量特发性黄斑裂孔患者眼轴长度虽无差异,但在临床中应结合2种仪器测量的结果综合考虑.