A novel eyelid motion monitor

Abstract

Background

Eyelid motion analysis can provide important information about ophthalmic, neurologic, and systemic diseases. Routine assessment of eyelid function is currently based mainly on clinical examination estimating Levator Function and static palpebral fissure measurements. Most clinical tools developed to date are cumbersome expensive and difficult to operate. Currently there is no widely available, affordable device providing user friendly precision based evaluation of eyelid kinematics. Our goal is to develop a novel device for evaluation of eyelid kinematics providing rapid defined diagnosis of diseases involving eyelid movement.

Methods

A real-time prototype eyelid motion monitoring system was designed based on magnetic field sensors detecting movement of a tiny magnet located on the upper eyelid. Motion is recorded and analyzed using specially developed hardware and software, respectively, enabling both real-time and off-line data presentation. The Eyelid Motion Monitor correlates between blinking characteristics of eyelid movement and the output voltages produced by the system. Blink detection is defined as peak in voltage, caused by eyelid closure or opening. The device was tested on 20 healthy volunteers with normal clinical blinking patterns.

Results

The Eyelid Motion Monitor succeeded in detecting full blink motion. The system easily extracts different parameters of eyelid kinetics.

Conclusions

An inexpensive prototype novel device was developed for monitoring and analyzing eyelid motion characteristics, including the inter-blink interval, eye closing/opening duration and entire blink duration. The device should allow early objective non- invasive diagnosis and follow-up of disease progression. It could be of great potential value in many ophthalmic, neurologic, and systemic diseases.

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Acknowledgements

The research is supported by the High Speed Digital Systems Laboratory (HS-DSL), Technion – Israel Institute of Technology and Emek Medical Center. Special thanks to Alex Kinko from the HS-DSL for guiding the software team (Boaz Blankrot, Leon Karabchevsky) and to Oz Levinkron (Technion Faculty of Medicine) and Adi Orbach (Emek Medical Center) for performing the clinical measurements.

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Correspondence to Adi Hanuka.

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No funding was received for this research.

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All authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers’ bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript.

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All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Additional informed consent was obtained from all individual participants for whom identifying information is included in this article.

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Informed consent was obtained from all individual participants included in the study.

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Hanuka, A., Itzhak, M., Berger, A. et al. A novel eyelid motion monitor. Graefes Arch Clin Exp Ophthalmol 255, 1811–1817 (2017). https://doi.org/10.1007/s00417-017-3712-z

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Keywords

  • Eyelid motion
  • Blink detection
  • Monitor device
  • Magnetic sensor