School of Ophthalmology and Optometry Wenzhou Medical University, China.
Amarnath & Shashi Khosla School of Information Technology, Indian Institute of Technology, New Delhi, India.
Vision Res. 2021 Sep;186:80-86. doi: 10.1016/j.visres.2021.05.004. Epub 2021 May 29.
Early visual deprivation is known to have profound consequences on the subsequent development of spatial visual processing. However, its impact on temporal processing is not well characterized. We have examined spatial and temporal contrast sensitivity functions following treatment for early and extended bilateral visual deprivation in fifteen children born with congenital cataracts in rural India. The results reveal a marked difference in post-treatment spatial and temporal sensitivities. Whereas spatial processing in newly sighted children is significantly impaired relative to age-matched controls, temporal processing exhibits remarkable resilience and is comparable to that in the control group. This difference in spatial and temporal outcomes is especially surprising given our computational analyses of video sequences which indicate a strong linkage between the spatial and temporal spectral content of natural visual inputs. We consider possible explanations for this discrepancy.
早期视觉剥夺已知对空间视觉处理的后续发展有深远影响。然而，其对时间处理的影响尚未得到很好的描述。我们研究了在印度农村接受早期和长期双侧视觉剥夺治疗的十五名先天性白内障患儿的空间和时间对比敏感度函数。结果显示，治疗后空间和时间敏感度存在明显差异。与年龄匹配的对照组相比，新视力儿童的空间处理明显受损，而时间处理则表现出显著的弹性，与对照组相当。鉴于我们对视频序列的计算分析表明自然视觉输入的空间和时间光谱内容之间存在很强的联系，这种空间和时间结果的差异尤其令人惊讶。我们考虑了这种差异的可能解释。
