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Related Experiment Video

Updated: Jul 10, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
07:24

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

Understanding eye deformation in non-contact tonometry.

Roland Kempf1, Yuichi Kurita, Yoshichika Iida

  • 1Graduate School of Engineering, Hiroshima University, Higashi-Hiroshima, Japan. info@r-kempf.de

Conference Proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference
|October 20, 2007
PubMed
Summary

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Focusing of Light in the Eye01:16

Focusing of Light in the Eye

Light rays enter the eye through the cornea, a transparent dome-shaped tissue that is the eye's outermost layer. The cornea bends or refracts, light rays traveling to the pupil. The shape of the cornea determines how much of the light is bent and whether the image will be focused correctly on the retina at the back of the eye. Once the light has passed through both refraction layers, it converges into a single focal point onto a small area. This is where photoreceptors start transforming...

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This study introduces a high-speed camera method for analyzing eye deformation during intraocular pressure (IOP) measurement. The new approach provides more detailed data for glaucoma diagnosis and treatment.

Area of Science:

  • Ophthalmology
  • Biomedical Engineering
  • Biomechanics

Background:

  • Non-contact tonometers measure intraocular pressure (IOP), crucial for glaucoma diagnosis.
  • Current methods estimate eye deformation from infrared light reflection during an air pulse.
  • Glaucoma is a leading cause of irreversible blindness worldwide.

Purpose of the Study:

  • To develop and validate a novel method for analyzing eye deformation during tonometry using high-speed videography.
  • To improve the accuracy of intraocular pressure measurement by capturing complete eye motion.
  • To refine eye models for better understanding corneal biomechanics.

Main Methods:

  • Utilized a high-speed camera to record the dynamic deformation of the eye during non-contact tonometry.

Related Experiment Videos

Last Updated: Jul 10, 2026

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane
07:24

Using Eye-tracking to Assess the Relative Importance of Visual and Vestibular Input to Subcortical Motion Processing in the Roll Plane

Published on: August 22, 2025

  • Developed a simplified eye model incorporating non-linear corneal material properties.
  • Analyzed the captured high-speed video data to derive eye motion and deformation patterns.

    • Main Results:

    • High-speed imaging provided comprehensive data on eye motion during the air pulse.
    • The analysis yielded a principal shape of eye deformation consistent with experimental observations.
    • The study demonstrated the feasibility of using direct motion capture for IOP assessment.

    Conclusions:

    • High-speed videography offers a more detailed approach to analyzing eye dynamics in tonometry.
    • This method has the potential to enhance the accuracy of intraocular pressure measurements.
    • Further research can integrate these findings into advanced glaucoma diagnostic tools.