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Related Experiment Videos

Eye-tracking infra-red optometer.

F Okuyama1, T Tokoro, M Fujieda

  • 1Department of Ophthalmology, School of Medicine, Tokyo Medical & Dental University, Tokyo, Japan.

Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)
|July 1, 1990
PubMed
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A new infra-red optometer with eye-tracking technology accurately measures dynamic eye refraction during movement. This device enables precise refractive power assessment, even during vergence, advancing ophthalmic measurement capabilities.

Area of Science:

  • Ophthalmology
  • Optometry
  • Biomedical Engineering

Background:

  • Accurate measurement of dynamic refractive power is crucial for understanding visual function.
  • Existing methods may have limitations in tracking rapid eye movements or maintaining alignment.

Purpose of the Study:

  • To develop and evaluate an eye-tracking infra-red optometer for dynamic refractive power measurement.
  • To assess the accuracy, precision, and tracking capabilities of the developed system.

Main Methods:

  • Integration of an infra-red optometer with an eye-tracking system.
  • Automatic alignment of the optometer's optical axis with the eye's visual axis during horizontal movement.
  • Testing measurement range, accuracy, precision, and tracking velocity.

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Main Results:

  • The system measures dynamic refractive power with an accuracy of ~0.4 D and precision of 0.05 D over a 60-degree eye movement range.
  • The optometer has a measurement range of -10 to +10 D.
  • Maximum trackable eye movement velocity exceeds 100 deg/s with a 0.13 s time delay.
  • Successful eye refraction measurement during vergence was confirmed.

Conclusions:

  • The developed eye-tracking infra-red optometer is a viable tool for measuring dynamic refractive power.
  • The system demonstrates high accuracy, precision, and tracking capabilities during eye movements.
  • This technology holds potential for improved ophthalmic diagnostics and research.