Sabherwal Shalinder, Javed Mohd, Watts Elanor, Katibeh Marzieh, Pintus Alice, Thaker Nam, Latorre-Arteaga Sergio, Hewitt Vince, Coverley Darren, Bolster Nigel M, Bastawrous Andrew
Department of Community Ophthalmology and Public Health Research, Dr. Shroff's Charity Eye Hospital, New Delhi, India.
International Centre for Eye Health, London School of Hygiene and Tropical Medicine, London, UK.
Transl Vis Sci Technol. 2025 Aug 1;14(8):24. doi: 10.1167/tvst.14.8.24.
The Peek digital near vision test has been previously validated in a trial setting; here it is assessed in clinic (stage 1) and community (stage 2) settings.
The study was carried out in the catchment area of Dr. Shroff's Charity Eye Hospital, Mohammadi, Uttar Pradesh, India, with a total of 768 participants. Stage 1 assessed the interobserver variability of Peek near vision impairment (NVI) screening in 168 clinic participants, with three trained community screeners. Stage 2 compared Peek to conventional chart testing for NVI screening using Cohen's kappa coefficient, sensitivity, and specificity and, for quantitative near visual acuity (NVA) measurement, using Bland-Altman limits of agreement (LoA) in 600 participants with two screeners.
In stage 1, interobserver variability using Peek ranged from 96.43% to 98.21% (kappa = 0.92-0.96). In stage 2, there was overall agreement in 95.8% of cases (kappa = 0.91). Peek testing had a sensitivity and specificity of 91.25% (95% confidence interval [CI], 87.22-94.1) and 99.41% (95% CI, 97.86-99.84), respectively. For NVA testing, the 95% LoA between Peek and chart testing were within -0.11 and +0.07 logMAR. Mean test time was 40.3 seconds (95% CI, 38.8-41.7) for Peek versus 46.6 seconds (95% CI, 45.5-47.7) for a conventional chart.
The previously demonstrated validity of Peek testing was maintained when used by trained community screeners.
The Peek near vision test can be used as a validated method of NVA/NVI measurement in research, clinical and community settings.
Peek数字近视力测试先前已在试验环境中得到验证；在此对其在诊所（第一阶段）和社区（第二阶段）环境中进行评估。
该研究在印度北方邦穆罕默迪市施罗夫慈善眼科医院的服务区域开展，共有768名参与者。第一阶段评估了168名诊所参与者中Peek近视力损害（NVI）筛查的观察者间变异性，由三名经过培训的社区筛查人员进行。第二阶段在600名参与者中，由两名筛查人员使用Cohen's kappa系数、敏感性和特异性，将Peek与传统视力表测试用于NVI筛查进行比较，对于定量近视力（NVA）测量，使用Bland-Altman一致性界限（LoA）。
在第一阶段，使用Peek的观察者间变异性范围为96.43%至98.21%（kappa = 0.92 - 0.96）。在第二阶段，95.8%的病例总体一致（kappa = 0.91）。Peek测试的敏感性和特异性分别为91.25%（95%置信区间[CI]，87.22 - 94.1）和99.41%（95% CI，97.86 - 99.84）。对于NVA测试，Peek与视力表测试之间的95% LoA在-0.11和+0.07 logMAR之内。Peek的平均测试时间为40.3秒（95% CI，38.8 - 41.7），而传统视力表为46.6秒（95% CI，45.5 - 47.7）。
当由经过培训的社区筛查人员使用时，Peek测试先前已证明的有效性得以保持。
Peek近视力测试可作为研究、临床和社区环境中NVA/NVI测量的一种经过验证的方法。
