Assessment of binocular alignment using the three-dimensional Strabismus Photo Analyzer

Hee Kyung Yang, Sang Beom Han, Jeong-Min Hwang, Young Jae Kim, Chang Bu Jeong, Kwang Gi Kim

Research output: Contribution to journalArticle

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Abstract

Aim: To evaluate the efficacy of the three-dimensional (3D) Strabismus Photo Analyzer for estimating binocular alignment using photographs. Methods: Thirty-two subjects with exotropia, 30 subjects with esotropia and 38 orthotropic subjects were included. Two independent ophthalmologists examined the angle of deviation using the Krimsky test and prism and alternate cover test (PCT). Full-face photographs were obtained using an 8.2-megapixel digital single-lens reflex camera, and the images were analysed using the 3D Strabismus Photo Analyzer. The images were adjusted for age-dependent ophthalmic biometry and angle k. The main outcome measures were inter-observer variability, test-retest reliability and correlation between the angles of deviation measured by different methods. Results: The 95% limit of agreement of inter-observer variability was ±3.5° (6.1 prism dioptres (PD)), ±3.1° (5.4 PD) and ±1.5̈ (2.6 PD) for the Krimsky test, PCT and the 3D Strabismus Photo Analyzer, respectively. The test-retest reliability was ±2.8̈ (4.9 PD) for the 3D Strabismus Photo Analyzer versus the Krimsky test. The results of the Krimsky test and 3D Strabismus Photo Analyzer showed a strong positive correlation. Conclusions: The 3D Strabismus Photo Analyzer is a simple and reliable tool for measuring ocular deviation. It has excellent agreement with the Krimsky test and substantially improved reproducibility.

Original languageEnglish
Pages (from-to)78-82
Number of pages5
JournalBritish Journal of Ophthalmology
Volume96
Issue number1
DOIs
StatePublished - 1 Jan 2012

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Strabismus
Observer Variation
Reproducibility of Results
Exotropia
Biometry
Esotropia
Lenses
Reflex
Outcome Assessment (Health Care)

Cite this

Yang, Hee Kyung ; Han, Sang Beom ; Hwang, Jeong-Min ; Kim, Young Jae ; Jeong, Chang Bu ; Kim, Kwang Gi. / Assessment of binocular alignment using the three-dimensional Strabismus Photo Analyzer. In: British Journal of Ophthalmology. 2012 ; Vol. 96, No. 1. pp. 78-82.
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Assessment of binocular alignment using the three-dimensional Strabismus Photo Analyzer. / Yang, Hee Kyung; Han, Sang Beom; Hwang, Jeong-Min; Kim, Young Jae; Jeong, Chang Bu; Kim, Kwang Gi.

In: British Journal of Ophthalmology, Vol. 96, No. 1, 01.01.2012, p. 78-82.

Research output: Contribution to journalArticle

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