College of Optometry, University of Houston, Houston, Texas, USA.
Department of Mathematics, University of Houston, Houston, Texas, USA.
Ophthalmic Physiol Opt. 2024 Sep;44(6):1072-1083. doi: 10.1111/opo.13349. Epub 2024 Jun 21.
SpotChecks is a new contrast sensitivity (CS) test designed for self-monitoring of vision. This study assessed the test-retest repeatability of take-home SpotChecks, in-office SpotChecks and near Pelli-Robson charts in healthy adults.
One eye of 61 healthy adults with near visual acuity (VA) of 6/9 or better (age range 22-84, mean 49 [18] years) was tested during two office visits (mean 10 [8] days apart). Each visit included high-contrast VA, then 12 randomly ordered CS tests (6 different SpotChecks and 6 different Pelli-Robson) under the same lighting (luminance 110 cd/m), all at near in the same eye with habitual correction. The same eye was self-tested with take-home SpotChecks once a day on 6 days between the office visits. SpotChecks was scored by the logCS at the highest line with ≥2 errors. Pelli-Robson was scored by [0.05 × number of letters read correctly - 0.15]. Repeatability of logCS was defined as 1.96 S, S representing within-subject standard deviation. Comparison for repeatability was performed with Bootstrap hypothesis test.
SpotChecks and Pelli-Robson showed similar intra-session or inter-visit repeatability (p = 0.14-0.81). Inter-day repeatability for take-home SpotChecks was 0.18 logCS, the same as that from the first measurements of two office visits with SpotChecks or Pelli-Robson. Inter-visit repeatability improved to 0.15 by using the average of two repeated measurements for SpotChecks (p = 0.02) or three repeated measurements for Pelli-Robson (p = 0.04). Age showed a small effect on logCS (-0.015/decade, p = 0.02) for both SpotChecks and Pelli-Robson. Mean logCS was 0.05 lower in those ≥50 years (SpotChecks 1.84 [0.10] and Pelli-Robson 1.77 [0.10]) compared with those <50 years of age (SpotChecks 1.89 [0.07] and Pelli-Robson 1.83 [0.07]).
SpotChecks showed good repeatability with take-home and in-office testing in healthy adults, making it a promising tool for monitoring disease progression at home.
SpotChecks 是一种新的对比敏感度（CS）测试，专为视力自我监测而设计。本研究评估了健康成年人在家中使用 SpotChecks、在诊所使用 SpotChecks 和近视力 Pelli-Robson 图表的测试-再测试重复性。
61 名年龄在 22-84 岁之间（平均 49[18]岁）、近视力（VA）为 6/9 或更好的健康成年人的一只眼睛在两次就诊时进行了测试（两次就诊间隔时间平均为 10[8]天）。每次就诊均包括高对比度 VA，然后在相同照明条件下（亮度为 110cd/m），在同一只眼睛中以习惯矫正的方式进行 12 次随机顺序的 CS 测试（6 种不同的 SpotChecks 和 6 种不同的 Pelli-Robson）。在两次就诊之间的 6 天内，同一只眼睛每天使用一次家用 SpotChecks 进行自我测试。SpotChecks 的评分方法是在最高行上有≥2 个错误的对数 CS。Pelli-Robson 通过 [0.05×正确读取的字母数-0.15] 进行评分。对数 CS 的重复性定义为 1.96 S，S 代表个体内标准差。使用 Bootstrap 假设检验进行重复性比较。
SpotChecks 和 Pelli-Robson 显示出相似的单次就诊或就诊间重复性（p=0.14-0.81）。家用 SpotChecks 的日间重复性为 0.18 对数 CS，与两次就诊中首次使用 SpotChecks 或 Pelli-Robson 时的测量结果相同。通过使用两次重复测量的平均值（p=0.02）或三次重复测量的平均值（p=0.04）来测量 SpotChecks，可将就诊间的重复性提高到 0.15。年龄对 SpotChecks 和 Pelli-Robson 的对数 CS 有轻微影响（每 10 年减少 0.015，p=0.02）。与<50 岁的人相比，≥50 岁的人的平均对数 CS 低 0.05（SpotChecks 为 1.84[0.10]，Pelli-Robson 为 1.77[0.10]）（SpotChecks 为 1.89[0.07]，Pelli-Robson 为 1.83[0.07]）。
SpotChecks 在健康成年人的家庭和诊所测试中表现出良好的重复性，使其成为在家中监测疾病进展的有前途的工具。
