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.