What it is
This study shows that the amplitude (size) of a saccade, the rapid eye movement between fixations, is itself a form of visual selection that filters information by spatial frequency rather than by location. Reducing saccade amplitude attenuated post-saccadic visual sensitivity within an amplitude-dependent range of low spatial frequencies, an effect robust enough that even minute changes in saccade size considerably affected visibility. The authors attribute this to how the kinematics of saccades transform the visual world into a spatiotemporal flow, with measured post-saccadic visibility closely following theoretical predictions based on the temporal bandwidth of retinal sensitivity.
Why it matters
Saccades have long been understood as selecting information by location, aiming the retina's high-acuity region at objects of interest. This work adds a second, complementary selection mechanism that operates on content (spatial frequency), suggesting the act of moving the eyes actively shapes what is perceived rather than only where the eyes point.
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Filed underOphthalmology and Visual Health Research