Monovision and the Misperception of Motion published in Current Biology
Monovision is a common prescription lens correction for presbyopia. Each eye is corrected for a different distance, causing one image to be blurrier than the other. Millions of people have monovision corrections, but little is known about how interocular blur differences affect motion perception. In a paper published in Current Biology, we report that blur differences cause a motion illusion that makes people dramatically misperceive the distance and three-dimensional direction of moving objects. The effect occurs because the blurry and sharp images are processed at different speeds. For moving objects, the mismatch in processing speed causes a neural disparity, which results in the misperceptions. The results show that these misperceptions can be severe enough to impact public safety and demonstrate that they can be eliminated with novel combinations of non-invasive ophthalmic interventions. The motion illusion and the paradigm we use to measure it should help reveal how optical and image properties impact temporal processing, an important but understudied issue in vision and visual neuroscience.
Full reference: Johannes Burge, Victor Rodriguez-Lopez, Carlos Dorronsoro. “Monovision and the Misperception of Motion”, Current Biology 29, 1–7 (2019)
Full article here