The effect of optotype size and velocity parameters on the performance of healthy young adult subjects on the gaze stabilization test.
The effect of optotype size and velocity parameters on the performance of healthy young adult subjects on the gaze stabilization test.
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视标大小和速度参数对健康年轻成年受试者在凝视稳定性测试中表现的影响。
DOI：
10.1097/mao.0b013e31827f192e
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
Whitney,SusanL
中科院分区：
文献类型：
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作者：
Mohammad,MahaT;Furman,JosephM;Sparto,PatrickJ;Marchetti,GregoryF;Whitney,SusanL
方法21例健康青年受试者（年龄21-34岁，平均26±4岁，其中男性10例）进行计算机GST检测。在很宽的头部速度范围内（每秒220度），使用视标大小和呈现时间的不同组合重复测试多次< 60 to>。检查的尺寸比受试者的静态视力（SVA）高0.20、0.25和0.30 logMAR。检查的演示时间分别为20，30，和40毫秒以上的主题的最小感知时间（mPT）。ResultsPerformance变化很大的基础上，在GST中使用的视标参数。SVA+ 0.20 logMAR和mPT+ 20 ms的视标组合是最困难的组合，所有受试者在所有速度下的平均表现低于64%。视标组合SVA+ 0.30 logMAR和mPT+ 40 ms是最简单的组合，受试者能够在任何头部速度下正确识别视标，平均准确度大于70%。增加头部速度在任何大小/时间组合造成恶化科目' performance.ConclusionOur研究结果表明，视标参数有显着影响科目的性能上的GST。
MethodsTwenty-one healthy young subjects (mean age, 26±4; range, 21–34, 10 male subjects) performed the computerized GST. Testing was repeated several times using different combinations of the optotype size and presentation time over a wide range of head velocities (< 60 to> 220 degrees per second). The sizes examined were 0.20, 0.25, and 0.30 logMAR above the subject’s static visual acuity (SVA). The presentation times examined were 20, 30, and 40 ms above the subject’s minimum perception time (mPT).ResultsPerformance varied considerably based on the optotype parameters used in the GST. The optotype combination of SVA+ 0.20 logMAR and mPT+ 20 ms was the most difficult combination with the average of all subjects’ performance less than 64% at all velocities. The optotype combination SVA+ 0.30 logMAR and mPT+ 40 ms was the easiest combination with subjects being able to correctly identify the optotype at any head velocity with greater than 70% average accuracy. Increasing the head velocity in any size/time combination caused deterioration in subjects’ performance.ConclusionOur study findings show that optotype parameters have significant influence on subjects’ performance on the GST.