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Wide two-dimensional field laser ray-tracing aberrometer.

Javier Mazzaferri1, Rafael Navarro

  • 1Instituto de Ciencia de Materiales de Aragón (ICMA), Consejo Superior de Investigaciones Científicas and Facultad de Ciencias, Universidad de Zaragoza, Zaragoza, Spain.

Journal of Vision
|February 4, 2012
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Summary

This study introduces a new laser ray-tracing (LRT) aberrometer for measuring peripheral eye aberrations across a wide visual field. The novel device overcomes challenges in assessing off-axis optical quality, providing valuable data for vision science.

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Area of Science:

  • Ophthalmology and Vision Science
  • Optical Engineering
  • Biomedical Instrumentation

Background:

  • Peripheral optical quality measurement is gaining interest.
  • Previous studies on optical aberrations focused centrally due to Hartmann-Shack sensor limitations.
  • Experimental data on peripheral visual field aberrations remain limited.

Purpose of the Study:

  • To present a novel laser ray-tracing (LRT) aberrometer for measuring peripheral eye aberrations.
  • To address the challenges in evaluating off-axis optical quality.
  • To enable wide-field (±40°) 2D visual field aberration measurements.

Main Methods:

  • Development of a novel laser ray-tracing (LRT) aberrometer.
  • Utilizing spiral-shaped sampling of the visual field.
  • Implementing real-time detection of the eye's entrance pupil and automatic ray bundle shaping.
  • Applying a 2D quadratic model for aberration analysis.

Main Results:

  • The LRT aberrometer successfully measured aberrations across a wide (±40°) 2D visual field.
  • Experimental data were collected from 11 healthy subjects.
  • Results align with existing findings on optical aberrations.

Conclusions:

  • The proposed LRT aberrometer is effective for measuring off-axis eye aberrations.
  • This technology advances the assessment of peripheral optical quality.
  • The findings contribute to a better understanding of visual field aberrations.