CONTRAST SENSITIVITY IN VISUALLY IMPAIRED CHILDREN
CONTRAST SENSITIVITY IN VISUALLY IMPAIRED CHILDREN
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视障儿童的对比敏感度
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
L. Hyvärinen
中科院分区：
文献类型：
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作者：
L. Hyvärinen
当视力受损时，空间对比敏感度在不同的空间频率下可能会不同程度地降低。具有中心暗点的患者在低空间频率下的敏感性可能正常或降低，他们的斯内伦敏锐度通常低于根据对比敏感度值估计的光栅敏锐度。在视网膜色素变性中，对比敏感度可能在青少年早期就已经在低空间频率下降低。由于辨别低对比度的能力在日常生活中很重要，因此空间对比敏感度测量应成为视力临床评估的一部分。
Spatial contrast sensitivity may decrease differently at different spatial frequencies when vision is impaired. Patients with central scotoma may have normal or decreased sensitivity at low spatial frequencies, their Snellen acuity often is lower than grating acuity estimated on the basis of contrast sensitivity values. In retinitis pigmentosa contrast sensitivity may decrease at the low spatial frequencies already in the early teens. Because the ability to discern low contrasts is important in daily living, spatial contrast sensitivity measurements should become a part of clinical evaluation of vision.