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Stereotest comparison: Efficacy, reliability, and variability of a new glasses-free stereotest

Lookup NU author(s): Dr Kathleen Vancleef, Professor Jenny ReadORCiD



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


© 2020 The Authors.Purpose: To test the validity of the ASTEROID stereotest as a clinical test of depth perception by comparing it to clinical and research standard tests. Methods: Thirty-nine subjects completed four stereotests twice: the ASTEROID test on an autostereo 3D tablet, a research standard on a VPixx PROPixx 3D projector, Randot Circles, and Randot Preschool. Within 14 days, subjects completed each test for a third time. Results: ASTEROID stereo thresholds correlated well with research standard thresholds (r = 0.87, P < 0.001), although ASTEROID underestimated standard threshold (mean difference = 11 arcsec). ASTEROID results correlated less strongly with Randot Circles (r = 0.54, P < 0.001) and Randot Preschool (r = 0.64, P < 0.001), due to the greater measurement range of ASTEROID (1–1000 arcsec) compared to Randot Circles or Randot Preschool. Stereo threshold variability was low for all three clinical stereotests (Bland– Altman 95% limits of agreement between test and retest: ASTEROID, ±0.37; Randot Circles, ±0.24; Randot Preschool, ±0.23). ASTEROID captured the largest range of stereo in a normal population with test–retest reliability comparable to research standards (immediate r = 0.86 for ASTEROID vs. 0.90 for PROPixx; follow-up r = 0.68 for ASTEROID vs. 0.88 for PROPixx). Conclusions: Compared to clinical and research standards for assessing depth percep-tion, ASTEROID is highly accurate, has good test–retest reliability, and measures a wider range of stereo threshold. Translational Relevance: The ASTEROID stereotest is a better clinical tool for deter-mining baseline stereopsis and tracking changes during treatment for amblyopia and strabismus compared to current clinical tests.

Publication metadata

Author(s): McCaslin AG, Vancleef K, Hubert L, Read JCA, Port N

Publication type: Article

Publication status: Published

Journal: Translational Vision Science and Technology

Year: 2020

Volume: 9

Issue: 9

Pages: 1-14

Online publication date: 20/08/2020

Acceptance date: 15/07/2020

Date deposited: 11/12/2020

ISSN (electronic): 2164-2591

Publisher: Association for Research in Vision and Ophthalmology Inc.


DOI: 10.1167/tvst.9.9.29


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