Fast and reliable stereopsis measurement at multiple distances with iPad
Manuel Rodriguez-Vallejo, Clara Llorens-Quintana, Diego Montagud,, Walter D. Furlan, Juan A. Monsoriu

TL;DR
This study introduces a new iPad application for quick, reliable stereopsis screening at multiple distances, showing comparable results to established tests and better reproducibility, especially at near distances.
Contribution
The paper presents a novel iPad-based stereopsis screening app that offers fast, reliable assessments at multiple distances, with validation against standard tests.
Findings
The app provides near stereopsis measurements comparable to TNO.
Reproducibility of the app is higher than TNO at near distances.
Limited resolution affects comparison at far distances.
Abstract
Purpose: To present a new fast and reliable application for iPad (ST) for screening stereopsis at multiple distances. Methods: A new iPad application (app) based on a random dot stereogram was designed for screening stereopsis at multiple distances. Sixty-five subjects with no ocular diseases and wearing their habitual correction were tested at two different distances: 3 m and at 0.4 m. Results were compared with other commercial tests: TNO (at near) and Howard Dolman (at distance) Subjects were cited one week later in order to repeat the same procedures for assessing reproducibility of the tests. Results: Stereopsis at near was better with ST (40 arcsec) than with TNO (60 arcsec), but not significantly (p = 0.36). The agreement was good (k = 0.604) and the reproducibility was better with ST (k = 0.801) than with TNO (k = 0.715), in fact median difference between days was…
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Taxonomy
TopicsGlaucoma and retinal disorders · Ophthalmology and Eye Disorders · Ophthalmology and Visual Impairment Studies
