Image jitter enhances visual performance when spatial resolution is impaired.

ABSTRACT:

Purpose

Visibility of low-spatial frequency stimuli improves when their contrast is modulated at 5 to 10 Hz compared with stationary stimuli. Therefore, temporal modulations of visual objects could enhance the performance of low vision patients who primarily perceive images of low-spatial frequency content. We investigated the effect of retinal-image jitter on word recognition speed and facial emotion recognition in subjects with central visual impairment.

Methods

Word recognition speed and accuracy of facial emotion discrimination were measured in volunteers with AMD under stationary and jittering conditions. Computer-driven and optoelectronic approaches were used to induce retinal-image jitter with duration of 100 or 166 ms and amplitude within the range of 0.5 to 2.6° vis

SUBMITTER: Watson LM 

PROVIDER: S-EPMC3440939 | biostudies-literature | 2012 Sep

REPOSITORIES: biostudies-literature