Development of grating acuity and contrast sensitivity in the central and peripheral visual field of the human infant
Development of grating acuity and contrast sensitivity in the central and peripheral visual field of the human infant
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DOI：
10.1016/0042-6989(95)00257-x
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发表时间：
1996-07-01
期刊：
影响因子：
1.8
通讯作者：
Norcia, AM
中科院分区：
文献类型：
--
作者：
Allen, D;Tyler, CW;Norcia, AM
应用双频VEP技术对39例10 ~ 39周婴幼儿的中枢和周边视功能进行了同步检测。在6或8 Hz下测量4度圆形视野内的中心视力和对比敏感度。周边敏锐度和对比敏感度，同时在另一个率与半圆形刺激延伸从8到16度。分析12和16 Hz的EEG，以确定中央和外周场的独立反应。在测试的年龄范围内，中心视力提高了约2.6倍，而外周视力提高了约2.2倍。中心敏锐度总是高出平均约2.3倍。对比敏感度显示出类似的发展，为中央和周边领域的早期快速上升的敏感性。版权所有（C）1996 Elsevier Science Ltd.
Central and peripheral visual functions were measured simultaneously in 39 infants from 10 to 39 weeks old using a dual-frequency VEP technique. Central acuity and contrast sensitivity over a 4 deg circular field were measured at 6 or 8 Hz. Peripheral acuity and contrast sensitivity were measured simultaneously at the other rate with a semi-circular stimulus extending from 8 to 16 deg. The EEG was analyzed at 12 and 16 Hz to determine the separate responses for the central and peripheral fields.Both central and peripheral VEP acuity developed over the age range tested. Central acuity improved by about a factor of 2.6 over the age range tested, while peripheral acuity improved by about a factor of 2.2. Central acuity was always higher by an average factor of about 2.3. Contrast sensitivity showed similar development for the central and peripheral fields with an early rapid rise in sensitivity. Copyright (C) 1996 Elsevier Science Ltd.