{"title":"Comparison of different methods to image the tear film before and during contact lens wear.","authors":"Srikanth Dumpati, Mukesh Kumar, Ajay Kumar Vijay, Jacqueline Tan, Mark Willcox","doi":"10.1016/j.clae.2025.102511","DOIUrl":null,"url":null,"abstract":"<p><strong>Purpose: </strong>To evaluate the repeatability and compare non-invasive tear breakup time (NIBUT) and tear film lipid layer thickness (TFLLT) measurements obtained using subjective (Keeler Tearscope-Plus) and objective (Oculus Keratograph 5M and LipiView II Interferometer) instruments before and during soft contact lens (CL) wear.</p><p><strong>Methods: </strong>This prospective, randomised, double-masked, crossover study involved ten healthy participants who wore two types of daily disposable soft CLs: hydrogel and silicone hydrogel. NIBUT and TFLLT were assessed under pre cornea (before lens insertion) and pre lens (over the lens) conditions. NIBUT was measured using Tearscope-Plus and the Oculus Keratograph 5M, while TFLLT was assessed with Tearscope-Plus and the LifpiView II Interferometer. Repeatability was evaluated using repeated-measures ANOVA within-subject standard deviation (Sw), coefficient of repeatability (CR), and intraclass correlation coefficient (ICC). Correlation between instruments was assessed using Spearman coefficients, while agreement was evaluated using Bland-Altman analysis.</p><p><strong>Results: </strong>NIBUT measured with the Tearscope-Plus demonstrated good to excellent repeatability (ICC: 0.84-0.96). TFLLT measured with the LipiView II Interferometer showed excellent repeatability (ICC: 0.92-0.96). The Oculus Keratograph 5M showed moderate to good repeatability for NIBUT (ICC: 0.67-0.85). No significant correlations were observed between NIBUT measurements from the Tearscope-Plus and Oculus Keratograph 5M (r range: 0.02-0.30; p > 0.05). In contrast, strong correlations were observed between TFLLT measurements from the Tearscope-Plus and LipiView II Interferometer in pre cornea (r = 0.72, p < 0.01) and pre hydrogel (r = 0.74, p = 0.02) conditions, with a moderate, non-significant correlation in the pre silicone hydrogel condition (r = 0.51, p = 0.13). Bland-Altman analysis revealed wide limits of agreement between instruments, indicating substantial measurements variability.</p><p><strong>Conclusion: </strong>Tearscope-Plus and LipiView II Interferometer demonstrated high repeatability for NIBUT and TFLLT, respectively. However, the Tearscope-Plus overestimated both NIBUT and TFLLT values compared to objective instruments, indicating that these instruments should not be used interchangeably in clinical practice or research.</p>","PeriodicalId":49087,"journal":{"name":"Contact Lens & Anterior Eye","volume":" ","pages":"102511"},"PeriodicalIF":3.7000,"publicationDate":"2025-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Contact Lens & Anterior Eye","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1016/j.clae.2025.102511","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"OPHTHALMOLOGY","Score":null,"Total":0}
引用次数: 0
Abstract
Purpose: To evaluate the repeatability and compare non-invasive tear breakup time (NIBUT) and tear film lipid layer thickness (TFLLT) measurements obtained using subjective (Keeler Tearscope-Plus) and objective (Oculus Keratograph 5M and LipiView II Interferometer) instruments before and during soft contact lens (CL) wear.
Methods: This prospective, randomised, double-masked, crossover study involved ten healthy participants who wore two types of daily disposable soft CLs: hydrogel and silicone hydrogel. NIBUT and TFLLT were assessed under pre cornea (before lens insertion) and pre lens (over the lens) conditions. NIBUT was measured using Tearscope-Plus and the Oculus Keratograph 5M, while TFLLT was assessed with Tearscope-Plus and the LifpiView II Interferometer. Repeatability was evaluated using repeated-measures ANOVA within-subject standard deviation (Sw), coefficient of repeatability (CR), and intraclass correlation coefficient (ICC). Correlation between instruments was assessed using Spearman coefficients, while agreement was evaluated using Bland-Altman analysis.
Results: NIBUT measured with the Tearscope-Plus demonstrated good to excellent repeatability (ICC: 0.84-0.96). TFLLT measured with the LipiView II Interferometer showed excellent repeatability (ICC: 0.92-0.96). The Oculus Keratograph 5M showed moderate to good repeatability for NIBUT (ICC: 0.67-0.85). No significant correlations were observed between NIBUT measurements from the Tearscope-Plus and Oculus Keratograph 5M (r range: 0.02-0.30; p > 0.05). In contrast, strong correlations were observed between TFLLT measurements from the Tearscope-Plus and LipiView II Interferometer in pre cornea (r = 0.72, p < 0.01) and pre hydrogel (r = 0.74, p = 0.02) conditions, with a moderate, non-significant correlation in the pre silicone hydrogel condition (r = 0.51, p = 0.13). Bland-Altman analysis revealed wide limits of agreement between instruments, indicating substantial measurements variability.
Conclusion: Tearscope-Plus and LipiView II Interferometer demonstrated high repeatability for NIBUT and TFLLT, respectively. However, the Tearscope-Plus overestimated both NIBUT and TFLLT values compared to objective instruments, indicating that these instruments should not be used interchangeably in clinical practice or research.
期刊介绍：
Contact Lens & Anterior Eye is a research-based journal covering all aspects of contact lens theory and practice, including original articles on invention and innovations, as well as the regular features of: Case Reports; Literary Reviews; Editorials; Instrumentation and Techniques and Dates of Professional Meetings.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
