ArticleJournal of visualized experiments : JoVE2020
Using an Automated Hirschberg Test App to Evaluate Ocular Alignment.
Article in Journal of visualized experiments : JoVE, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Automated strabismus evaluation: a critical review and meta-analysis.Frontiers in neurology · 2025Pooled it
- Squint ASSIST: A Novel Application Program for Detecting Strabismus and Measuring Angle of Deviation.Clinical ophthalmology (Auckland, N.Z.) · 2026Article
- Quantitative Assessment of Strabismus Using Cloud AI Computing: Validation Study.JMIR formative research · 2025Article
- Subjective Refraction Test Using a Smartphone for Vision Screening.Journal of visualized experiments : JoVE · 2024Article
- Using Smartphones to Enhance Vision Screening in Rural Areas: Pilot Study.JMIR formative research · 2024Article
- Development and Preliminary Validation of a Virtual Reality Approach for Measurement of Torsional Strabismus.Journal of neuro-ophthalmology : the official journal of the North American Neuro-Ophthalmology Society · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
4 authors.
Funding
Abstract
A smartphone app has been developed to perform the automated photographic Hirschberg test for objective measurement of ocular misalignment. By computing the difference in corneal reflection generated by the phone camera flash relative to the iris center based on high resolution images, the app can measure misalignment with a much higher precision than the naked eye performing the Hirschberg test. It has been validated in a previous clinical evaluation study by comparing to the clinical gold standard-prism and alternate cover test. The goal of this article is to describe the testing techniques regarding how to use the app to measure ocular alignment for different fixation distances, without or with cover to break fusion, as well as angle kappa, so that users can use the app to perform equivalent tests typically done in clinic using prisms.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.