Aging of low and high level vision: from chromatic and achromatic contrast sensitivity to local and 3D object motion perception.

Results Functional Evaluation of Low-level Visual Age-related Changes ISF perimetry (Intermediate spatial frequency channel) We measured achromatic CS at an intermediate spatial frequency for nine visual field locations (see Figure 1A for data across quadrants and Figure 2 for representative examples of age-related CS decline obtained with ISF perimetry for each age group) and found a highly significant effect of aging on mean CS [F (4,164) = 53.09, p<0.001].

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However, tritan thresholds did reveal a significant age effect [χ 2 (4)tritan = 12.70, p = 0.013], though post hoc (Dunn-Bonferroni) tests revealed only a marginally significant difference between two age groups ([30;40[vs [40;50[; p = 0.074).

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