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Impact of Peripheral Refractive Errors in Mobility Performance.

Clara García-Pedreño1,2, Juan Tabernero1,2, Antonio Benito2

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Peripheral refractive errors significantly impact stair negotiation mobility. Even small errors caused slower walking speeds and increased step counts, highlighting the need to consider these effects in vision correction.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Biomechanics

Background:

  • Peripheral refractive errors are common and can influence visual perception.
  • Understanding their impact on functional tasks like mobility is crucial for vision science.

Purpose of the Study:

  • To investigate the functional effects of induced peripheral refractive errors on stair negotiation performance.

Main Methods:

  • Twenty-one subjects performed stair negotiation wearing spectacles inducing peripheral defocus (+/-2D, +/-4D) or astigmatism.
  • Gait parameters and foot trajectories were analyzed.
  • Peripheral refraction was measured using a Hartmann-Shack wavefront sensor.

Main Results:

  • Peripheral errors significantly altered stair negotiation, increasing crossing time by up to 29.6% with +4D lenses.
  • Subjects exhibited slower speeds, more steps, and cautious behavior.
  • Positive defocus lenses had a greater impact than negative defocus lenses.

Conclusions:

  • Induced peripheral refractive errors impair mobility performance during stair negotiation.
  • Magnification effects and intrinsic peripheral refraction likely contribute to these performance differences.
  • Findings emphasize the importance of considering peripheral optics in myopia control and intraocular lens design.