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Related Experiment Videos

A Badal optical stimulator for the Canon AutoRef R-1 optometer

J T Gallagher1, K Citek

  • 1State College of Optometry, State University of New York, New York, USA.

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|April 1, 1995
PubMed
Summary

Researchers developed a compact device for the Canon AutoRef R-1 optometer. This device precisely controls accommodative stimulus, aiding studies on the eye's refractive state and visual accommodation.

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Area of Science:

  • Ophthalmology
  • Optometry
  • Vision Science

Background:

  • The Canon AutoRef R-1 optometer objectively measures refractive state using near-infrared radiation.
  • Current optometers lack controlled accommodative stimulus capabilities for precise research.

Purpose of the Study:

  • To describe a novel compact device for the Canon AutoRef R-1 optometer.
  • To enable controlled optical vergence (accommodative stimulus) for vision research.

Main Methods:

  • A compact device was designed and mounted coaxially with the R-1 optometer's measurement optics.
  • The device provides controlled optical vergence from +10.0 to -20.0 Diopters.
  • A constant visual angle is maintained during stimulus delivery.

Main Results:

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  • The device integrates seamlessly with the R-1 optometer.
  • It delivers a wide range of controlled accommodative stimuli.
  • Objective refractive state measurements can be performed with controlled accommodation.

Conclusions:

  • The developed device enhances the R-1 optometer's utility for accommodation research.
  • It allows for precise investigation of accommodative response and open-loop accommodation.
  • This innovation facilitates more controlled studies in vision science.