Accommodative responses to naturalistic stimuli.

Accommodative responses to naturalistic stimuli.
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对自然刺激的适应性反应。

DOI:
10.1111/j.1475-1313.1990.tb00971.x
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发表时间:
1990
期刊:
Ophthalmic & physiological optics : the journal of the British College of Ophthalmic Opticians (Optometrists)
影响因子:
--
通讯作者:
Ong,E
Ong,E
中科院分区:
--
文献类型:
--
作者:
Ciuffreda,KJ;Rosenfield,M;Rosen,J;Azimi,A;Ong,E

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在12名视觉正常的年轻受试者中研究了对广泛的常见纹理和图形刺激的稳态反射反应。描述了两个实验的细节。在第一个实验中,刺激物的大小,对比度,空间频率,颜色和智力需求。在第二个实验中,只有目标的颜色被系统地改变。在这两个实验中,刺激需求保持在3D,并使用哈廷格符合视力计主观测量调节。在两个实验中采用的广泛不同的目标之间没有观察到显著差异的平均抑制反应。这些发现表明,存在一个整体阈值的重复刺激,低到中等对比度的超阈值目标能够启动和维持适当的重复反应。
Steady‐state accommodative responses to a wide range of commonly encountered textural and graphic stimuli were investigated in 12 young, visually normal subjects. Details of two experiments are described. In the first experiment, stimuli were varied in terms of size, contrast, spatial frequency, colour and intellectual demand. In the second experiment, only the colour of the targets was systematically altered. In both experiments the stimulus demand was maintained at 3 D, and accommodation was measured subjectively using a Hartinger coincidence optometer. No significant difference in mean accommodative response was observed between the widely differing targets adopted in either experiment. These findings suggest that an overall threshold exists for accommodative stimuli, with supra‐threshold targets of low to moderate contrast being capable of initiating and sustaining an appropriate accommodative response.
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