Binocular vision and abnormal head posture in children when watching television
Author:
Corresponding Author:

Affiliation:

Clc Number:

Fund Project:

Supported by the Scientific and Technological Project of Henan Scientific Committee (No.112102310193; No.122102310132; No.132102310132); the Key Scientific Research Project of Education Department of Henan Province (No.12A320068); the Medical Science Research Project of Henan Province (No.201003112).

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    AIM: To determine the association between the binocular vision and an abnormal head posture (AHP) when watching television (TV) in children 7-14y of age. METHODS: Fifty normal children in the normal group and 52 children with an AHP when watching TV in the AHP group were tested for spherical equivalents, far and near fusional convergence (FC) and fusional divergence (FD) amplitudes, near point of convergence, far and near heterophoria, accommodative convergence/ accommodation ratio and stereoacuity. The values of these tests were compared between the two groups. The independent t test was applied at a confidence level of 95%. RESULTS: The far and near FC amplitudes and far FD amplitudes were lower in the AHP group (the far FC amplitudes: break point 13.6±5.4△, recovery point 8.7±5.4△. The near FC amplitudes: break point 14.5±7.3△, recovery point 10.3±5.1△. The far FD amplitudes: break point 3.9±2.7△, recovery point 2.6±2.3△) compared with those in the normal group (the far FC amplitudes: break point 19.1±6.2△, recovery point 12.4±4.5△. The near FC amplitudes: break point 22.3±8.0△, recovery point 16.1±5.7△. The far FD amplitudes: break point 7.0±2.1△, recovery point 4.6±1.9△). Other tests presented no statistically significant differences. CONCLUSION: An association between the reduced FC and FD amplitudes and the AHP in children when watching TV is proposed in the study. This kind of AHP is considered to be an anomalous manifestation which appears in a part of puerile patients of fusional vergence dysfunction.

    Reference
    Related
    Cited by
Get Citation

Di Zhang, Wei-Hong Zhang, Shu-Zhen Dai, et al. Binocular vision and abnormal head posture in children when watching television. Int J Ophthalmol, 2016,9(5):746-749

Copy
Share
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
Publication History
  • Received:January 26,2015
  • Revised:September 23,2015
  • Adopted:
  • Online: May 23,2016
  • Published: