Task Complexity and Visual Acuity in Senile Macular Degeneration
Task Complexity and Visual Acuity in Senile Macular Degeneration
复制标题
老年性黄斑变性的任务复杂性和视力
DOI：
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发表时间：
1981
期刊：
影响因子：
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通讯作者：
I. Bailey
中科院分区：
文献类型：
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作者：
J. Kitchin;I. Bailey
摘要研究了测试对象的选择和符号间距(轮廓交互作用)对低视力测量的影响。对16例老年性黄斑变性患者和5例年龄匹配的正常人进行了不同复杂程度的视力测试。两组受试者的视力都随着任务复杂性的增加而下降，但低视力受试者的下降趋势更为明显。然而，在低视力组中，复杂性效应并不依赖于视力水平。
这项研究表明，老年性黄斑变性患者的视力可以用单字母、等轮廓相互作用的Landolt环或Bailey-Lovie字母表同样好地测量，但所使用的测试应具体说明。光栅靶和单词图测量的视觉功能与标准视力测试的不同。
ABSTRACT The effects of choice of test object and inter-symbol spacing (contour interaction) on the measurement of low visual acuities was investigated. Visual acuities of sixteen subjects with senile macular degeneration and five age-matched normal subjects were measured using different test targets of varying complexities. Visual acuity of both groups of subjects decreased with increasing task complexity but the trend was more marked for the low vision subjects. However, within the low vision group, the complexity effect was not dependent on the level of visual acuity.
This study showed that visual acuity of persons with senile macular degeneration can be measured equally well with single letters, constant contour interaction Landolt rings, or the Bailey-Lovie letter chart but the test used should be specified. Grating targets and word charts measure different visual functions from standard visual acuity tests.