ASTEROID: A New Clinical Stereotest on an Autostereo 3D Tablet

Area of Science:

• Ophthalmology
• Vision Science
• Human Computer Interaction

Background:

• Stereoacuity is crucial for depth perception and binocular vision.
• Traditional stereoacuity tests may lack portability or ease of use in clinical settings.
• Advancements in autostereoscopic displays offer new possibilities for vision testing.

Purpose of the Study:

• To introduce ASTEROID, a novel game-based stereotest on an autostereoscopic tablet.
• To evaluate the reliability and clinical suitability of ASTEROID for stereoacuity measurement.
• To determine the distribution of stereo thresholds in an adult population using this new device.

Main Methods:

• Utilized dynamic random-dot stereograms with a Bayesian adaptive staircase for threshold estimation.
• Implemented real-time viewing distance monitoring and dynamic parallax adjustment for accurate retinal disparity.
• Collected 20 responses per participant to estimate stereo thresholds.

Main Results:

• ASTEROID requires a viewing distance greater than 35 cm for optimal depth perception.
• Stereo thresholds were normally distributed with a mean of 56 arcsec (log10 = 1.75).
• Thresholds were approximately 1.5 times higher than other stereotests, with good test-retest reliability (r=0.80, Bland-Altman SD=0.32 log10 arcsec).

Conclusions:

• ASTEROID is a reliable, user-friendly, and portable tool for clinical stereoacuity assessment.
• The study demonstrates the feasibility of research-quality stereoacuity measurement in clinics using modern 3D digital technology.
• ASTEROID is well-suited for routine eye examinations and vision research.