A Feasibility Study of Tablet-Based Eye Movement Assessment Using a Built-In Camera: A Pilot Study

TL;DR

This study explores using a tablet's built-in camera to assess eye movements, finding it could be a low-cost tool for screening and monitoring eye function.

Contribution

The study introduces a tablet-based system for eye movement assessment and explores its feasibility for functional monitoring.

Findings

Smooth pursuit traversal times varied significantly with difficulty levels and visual function parameters.

Saccadic accuracy showed significant differences between difficulty levels and visual function groups.

Tablet-based eye movement metrics correlated with conventional visual function measures in healthy participants.

Abstract

This study developed a tablet PC–based eye movement assessment application and conducted a pilot investigation to explore whether tablet-based ocular motor metrics demonstrate functional sensitivity to variations in conventional visual function parameters. Twenty-three healthy adults (10 males, 13 females; mean age: 24.41 ± 1.91 years) without a history of ocular disease performed smooth pursuit and saccadic eye movement tests at three difficulty levels. For exploratory analysis, participants were stratified into above- and below-mean groups based on conventional visual function test results. For smooth pursuit movements, mean pursuit traversal time demonstrated statistically significant differences between the low–medium (1.11 s) and low–high (1.14 s) difficulty levels (p < 0.05), with corresponding differences in derived velocity. Saccadic movements showed significant mean accuracy differences between low-high (1.02 points) and medium-high (0.95 points) difficulty levels (p < 0.05). Participants with higher-than-average horizontal phoria values (distance and near) and the blur/break points of near convergence amplitude exhibited significantly longer smooth pursuit traversal times (corresponding to slower derived velocities) (p < 0.05). The high-value group for blur point of near convergence amplitude demonstrated significantly superior saccadic accuracy (1.63 points) compared with the low-value group (1.30 points) (p < 0.05). Exploratory associations between visual function parameters and ocular motor performance were observed within the healthy participant group, suggesting exploratory associations between tablet-based smooth pursuit and saccadic eye movement performance and conventional visual function measures. These findings suggest that tablet PC–based eye movement assessment may serve as a feasible, low-cost approach for exploratory screening and functional monitoring, rather than a validated diagnostic tool.

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