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Self-motion illusions from distorted optic flow in multifocal glasses.

Yannick Sauer1, Malte Scherff2, Markus Lappe2

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Summary
This summary is machine-generated.

Progressive addition lenses (PALs) can cause unnatural self-motion perception due to visual distortions. Careful gaze strategies may help mitigate these illusions for PAL wearers.

Keywords:
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Area of Science:

  • Ophthalmology
  • Visual Perception
  • Human-Computer Interaction

Background:

  • Progressive addition lenses (PALs) correct presbyopia but can distort peripheral vision.
  • Distortions in PALs are linked to unnatural self-motion perception in wearers.
  • Optic flow, the pattern of retinal motion, guides visual self-motion perception.

Purpose of the Study:

  • To investigate the influence of PAL distortions on optic flow-based heading estimation.
  • To analyze how PALs affect self-motion perception through psychophysical experiments and modeling.

Main Methods:

  • Utilized a computational model of heading perception.
  • Conducted a virtual reality-based psychophysical experiment to simulate PAL distortions.
  • Measured heading estimation accuracy under different gaze conditions and simulated visual field sizes.

Main Results:

  • The model predicted altered heading estimation based on visual field size and gaze direction.
  • Participants reported upward deviations in perceived self-motion when viewing through simulated PAL periphery.
  • No significant self-motion deviations were observed when gaze was directed through the center of the simulated lenses.

Conclusions:

  • Progressive addition lenses can induce illusions of self-motion due to peripheral visual distortions.
  • The findings suggest that PALs can impact spatial orientation and navigation.
  • Adopting specific gaze strategies may help minimize or correct these self-motion illusions for PAL users.