ABSTRACT

Objectives

To assess the effectiveness of an eye-tracking-based test (ETBT) to measure eye deviation angle vs. a manual prism alternating cover test (PACT) in children with strabismus.

Design

The prospective, masked, cross-sectional study included 95 children aged 1.8 years and older. Eye deviation was tested twice by each of ETBT and PACT. Each subject underwent four strabismus measurements, two by the ETBT and two by PACT. In each test, subjects were fixated on accommodative targets at 50 cm, with habitual optical correction allowed. Masked examiners compared the manual PACT results with those of the ETBT.

Results

There was a high correlation (about 90%) between the ETBT and PACT. Repeatability of ETBT was higher than that of PACT (correlation coefficients of 0.99 and 0.91 respectively, p < .002). Age, strabismus type, and eye deviation measurement did not affect repeatability of ETBT. However, in PACT, results could not be correlated between the two examiners when the deviation was larger than 40 prism diopters.

Conclusions

The ETBT was effective in measuring eye deviation in children as young as 1.8 years. The ETBT showed higher repeatability compared to PACT.

中文翻译：

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眼动追踪测试在儿童斜视测量中的有效性和可重复性

摘要

目标

评估基于眼动追踪的测试 (ETBT) 与手动棱镜交替覆盖测试 (PACT) 在斜视儿童中测量眼偏角的效果。

设计

前瞻性、蒙面、横断面研究包括 95 名 1.8 岁及以上的儿童。ETBT 和 PACT 分别测试了两次眼睛偏差。每个受试者接受了四次斜视测量，两次通过 ETBT 测量，两次通过 PACT 测量。在每次测试中，受试者都固定在 50 厘米处的可调节目标上，并允许进行习惯性的光学校正。蒙面检查员将手动 PACT 结果与 ETBT 的结果进行了比较。

结果

ETBT 和 PACT 之间存在高度相关性（约 90%）。ETBT 的重复性高于 PACT（相关系数分别为 0.99 和 0.91，p < .002）。年龄、斜视类型和眼偏差测量不影响 ETBT 的可重复性。然而，在 PACT 中，当偏差大于 40 棱镜屈光度时，两个检查者之间的结果无法相关。

结论

ETBT 可有效测量年仅 1.8 岁儿童的眼睛偏差。与 PACT 相比，ETBT 显示出更高的可重复性。