Luo Mingyue, Liu Xinyu, Zhang Dingding, Chen Youxin, Kang Weijuan
Department of Ophthalmology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
Beijing Key Laboratory of Fundus Diseases Intelligent Diagnosis & Drug/Device Development and Translation, Beijing, China.
Front Med (Lausanne). 2025 Feb 24;12:1447679. doi: 10.3389/fmed.2025.1447679. eCollection 2025.
This study aimed to test the repeatability of visual acuity (VA) measurement using an novel intelligent projector visual acuity (IP) chart (LSJ-IVAC-6000A, Hunan Liangshi Jia Biotechnology Co., Ltd.) and the consistency of VA measurement between the IP chart and the 5 m standard logarithmic visual acuity (SL) chart (GB11533-2011).
In this prospective comparative study, 53 subjects were included to test the internal repeatability of the IP chart. Both eyes of the subjects were tested three times, with a minimum interval of 10 min. The intraclass correlation coefficient (ICC) was used to evaluate the repeatability. One hundred subjects were included to test the consistency between two charts. Both eyes of the subjects were tested with two charts in random order with an interval of 10 min for each test. ICC and the Bland-Altman statistical analyses were used to analyze the consistency of the two charts. VA values were expressed by the logMAR recording method. The time consumption for each test was recorded in seconds.
In the repeatability analysis, the ICC values of the right and left eye were 0.968 (95% CI, 0.950-0.981, < 0.001) and 0.964 (95% CI, 0.944-0.978, < 0.001), respectively. In the consistency analysis, the ICC values of the right and left eye were 0.946 (95% CI, 0.919-0.963, < 0.001) and 0.817 (95% CI, 0.727-0.877, < 0.001), respectively. However, the 95% limits of agreement (LoA) of the differences in the VA measurements between the IP and SL chart for the right and left eye were -0.26 to 0.31 and -0.34 to 0.39, respectively, suggesting a certain degree of instability in the measurements of the SL chart. There was no significant difference in the time consumption of VA measurements between the two charts ( = 0.668). In the consistency analysis of subgroups by age, the ICC values were >0.8 ( < 0.001) in the most groups except for the left eyes of 51-70 years old subgroup which had an ICC value of 0.448 (95% CI, -0.919 to 0.841, = 0.17), with 95% LoA of -1.02 to 0.77.
The IP chart demonstrated good repeatability and overall consistency with the SL chart.
本研究旨在测试使用新型智能投影仪视力（IP）表（LSJ-IVAC-6000A，湖南良视佳生物技术有限公司）测量视力（VA）的可重复性，以及IP表与5米标准对数视力（SL）表（GB11533-2011）之间VA测量的一致性。
在这项前瞻性比较研究中，纳入53名受试者以测试IP表的内部可重复性。对受试者的双眼各进行三次测试，最短间隔10分钟。使用组内相关系数（ICC）评估可重复性。纳入100名受试者以测试两张图表之间的一致性。对受试者的双眼用两张图表按随机顺序进行测试，每次测试间隔10分钟。使用ICC和Bland-Altman统计分析来分析两张图表的一致性。VA值采用logMAR记录法表示。记录每次测试的耗时（以秒为单位）。
在可重复性分析中，右眼和左眼的ICC值分别为0.968（95%CI，0.950-0.981，<0.001）和0.964（95%CI，0.944-0.978，<0.001）。在一致性分析中，右眼和左眼的ICC值分别为0.946（95%CI，0.919-0.963，<0.001）和0.817（95%CI，0.727-0.877，<0.001）。然而，IP表和SL表之间右眼和左眼VA测量差异的95%一致性界限（LoA）分别为-0.26至0.31和-0.34至0.39，表明SL表测量存在一定程度的不稳定性。两张图表之间VA测量的耗时无显著差异（=0.668）。在按年龄分组的一致性分析中，除51-70岁亚组的左眼ICC值为0.448（95%CI，-0.919至0.841，=0.17），95%LoA为-1.02至0.77外，大多数组的ICC值>0.8（<0.001）。
IP表显示出良好的可重复性以及与SL表的总体一致性。
