Investigative Ophthalmology & Visual Science Cover Image for Volume 62, Issue 8
June 2021
Volume 62, Issue 8
Open Access
ARVO Annual Meeting Abstract  |   June 2021
Automatic Measurements of Eye Movements using Video Oculography and Single Shot MultiBox Detector
Author Affiliations & Notes
  • Masakazu Hirota
    Orthoptics, Teikyo Daigaku, Itabashi-ku, Tokyo, Japan
    Ophthalmology, Teikyo Daigaku, Itabashi-ku, Tokyo, Japan
  • Takao Hayashi
    Orthoptics, Teikyo Daigaku, Itabashi-ku, Tokyo, Japan
    Ophthalmology, Teikyo Daigaku, Itabashi-ku, Tokyo, Japan
  • Emiko Watanabe
    Ophthalmology, Teikyo Daigaku, Itabashi-ku, Tokyo, Japan
  • Yuji Inoue
    Ophthalmology, Teikyo Daigaku, Itabashi-ku, Tokyo, Japan
  • Atsushi Mizota
    Ophthalmology, Teikyo Daigaku, Itabashi-ku, Tokyo, Japan
  • Footnotes
    Commercial Relationships   Masakazu Hirota, None; Takao Hayashi, None; Emiko Watanabe, None; Yuji Inoue, None; Atsushi Mizota, None
  • Footnotes
    Support   JSPS KAKENHI Grant Number 19K20728.
Investigative Ophthalmology & Visual Science June 2021, Vol.62, 2392. doi:
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      Masakazu Hirota, Takao Hayashi, Emiko Watanabe, Yuji Inoue, Atsushi Mizota; Automatic Measurements of Eye Movements using Video Oculography and Single Shot MultiBox Detector. Invest. Ophthalmol. Vis. Sci. 2021;62(8):2392.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : The purpose of this study was to develop a technique that would combine video oculography (VOG) with single shot multibox detector (SSD) to accurately and quantitatively examine eye movements.

Methods : Eleven healthy volunteers (21.3 ± 0.9 years) participated in this study. Eye movements were recorded during the tracking of the target using a custom-made eye tracker based on EMR-9 (NAC Image Technology Inc.). The subjects were asked to fixate on the nose of the rabbit-like target (visual angle was 0.1°) that was manually moved to a distance of 1 meter by the examiner during the eye movement test. The test produced 500 images from the VOG external camera and these images were divided into 3 groups (300, 100, and 100) for training, verification, and testing. The performance of the SSD was evaluated with 75% average precision (AP75), and the relationship between the location of the fixation target (calculated by the SSD) and the positions of both eyes (recorded by the VOG) was analyzed.

Results : The AP75 of the SSD on one class of targets was 97.7%. The horizontal and vertical target locations significantly and positively correlated with the horizontal dominant (horizontal, adjusted R2 = 0.984, P < 0.001; vertical, adjusted R2= 0.955, P < 0.001) and nondominant (horizontal, adjusted R2= 0.983, P < 0.001; vertical, adjusted R2= 0.964, P < 0.001) eye positions.

Conclusions : Our findings suggest that using VOG with SSD is suitable to evaluate eye version movements in the standard clinical assessment.

This is a 2021 ARVO Annual Meeting abstract.

 

The white cross and black square indicate gazes of left and right eyes, respectively. The red bounding box indicates the area the SSD model recognized as the target.

The white cross and black square indicate gazes of left and right eyes, respectively. The red bounding box indicates the area the SSD model recognized as the target.

 

The blue, red, and green lines indicate the horizontal left and right eye positions and target location during the eye movement test.

The blue, red, and green lines indicate the horizontal left and right eye positions and target location during the eye movement test.

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