• DOI:10.3928/01913913-20170322-02
• Corpus ID: 45251982

Comparison of Objective and Subjective Techniques of Strabismus Measurement in Adults With Normal Retinal Correspondence.

@article{Bitner2017ComparisonOO,
  title={Comparison of Objective and Subjective Techniques of Strabismus Measurement in Adults With Normal Retinal Correspondence.},
  author={Derek P. Bitner and Ore-ofe O. Adesina and kai ding and Bradley K. Farris and R Michael Siatkowski},
  journal={Journal of pediatric ophthalmology and strabismus},
  year={2017},
  volume={54 4},
  pages={
          216-220
        }
}

• Derek P. Bitner, O. Adesina, +2 authors R. Michael Siatkowski
• Published 17 May 2017
• Medicine
• Journal of pediatric ophthalmology and strabismus

PURPOSE
Accurate measurement of strabismus is vital to proper diagnosis and treatment. Objective and subjective measurement techniques can be used. The authors hypothesized that subjective measurement techniques would measure larger deviations than objective ones.

METHODS
Adults with strabismus, visual acuity greater than 20/50 in each eye, and normal retinal correspondence were measured in primary gaze at distance and near using the alternate prism and cover test and the red glass test.

RESULTS
Seventy-three patients were prospectively enrolled. Objective mean deviations were 9.1 (distance horizontal), 5.1 (distance vertical), 10.0 (near horizontal), and 2.6 (near vertical) prism diopters (PD). Subjective mean deviations were 10.2 (distance horizontal), 6.8 (distance vertical), 12.2 (near horizontal), and 3.2 (near vertical) PD. Subjective measurements were larger by a statistically significant margin and were more likely to show the presence of a vertical deviation not measured objectively (19 occurrences vs 2 at near, P = .008; 15 occurrences vs 0 at distance, P = .004). The measured deviations were within 5 PD horizontally and 3 PD vertically most of the time (range: 66.7% to 83.6%).

CONCLUSIONS
The red glass test was more likely to measure a larger deviation at distance and near and to identify a vertical deviation not seen objectively at both distance and near. The mean difference between the tests was usually not large enough to affect surgical treatment, but could potentially result in different amounts of prescribed prism for patients treated optically. [J Pediatr Ophthalmol Strabismus. 2017;54(4):216-220.].