Objective To evaluate differences between the prism bar and synoptophore methods in the measurement of fusional convergence and fusional divergence in normal children. Methods This was a prospective research study. Children aged 8 to 15 years who had no ocular disease were recruited and tested with their prescribed refractions. The break and recovery points of fusional convergence and fusional divergence were measured by the prism bar and synoptophore methods respectively. Each test was repeated 3 times. An independent samples t-test was used to compare the difference between the 2 methods. Correlation between the two methods was analyzed by a Spearman rank correlation. Results There were no differences in break and recovery points of fusional vergences between dominant eye and non-dominant eye. There were positive correlations between break point values measured by the synoptophore and prism bar (convergence r=0.60, P<0.01; divergence r=0.46, P<0.05). When measured by the prism bar and synoptophore respectively, no significant differences could be found for either the values of the break points or that of recovery points of the 2 methods. Conclusion When measuring the distance fusional vergences, prism bar and synoptophore with similar effect.
傅涛,郗平,王京辉,苏庆,李育,卢炜. 三棱镜排镜法和同视机法测量正常儿童双眼运动融合功能的差异[J]. 中华眼视光学与视觉科学杂志, 2015, 17(1): 53-56.
Fu Tao,Xi Ping,Wang Jinghui,Su Qing,Li Yu,Lu Wei.. Measuring binocular fusion in normal children: A comparison between the prism bar method and synoptophore method. Chinese Journal of Optometry Ophthalmology and Visual science, 2015, 17(1): 53-56. DOI: 10.3760/cma.j.issn.1674-845X.2015.01.013
Rowe FJ. Fusional vergence measures and their significance in clinical assessment[J]. Strabismus,2010,18(2):48-57.
[2]
Rouse MW, Borsting E, Deland PN, et al. Reliability of binocular vision measurements used in the classification of convergence insufficiency[J]. Optom Vis Sci,2002,79(4):254-264.
[3]
Rosenfield M, Ciuffreda KJ, Ong E, et al. Vergence adaptation and the order of clinical vergence range testing[J]. Optom Vis Sci,1995,72(4):219-223.
[4]
Hainey J, Cleary M, Wright L. Does ocular dominance influence the clinical measurement of fusional amplitude?[J]. Br Orthopt J,1999,56:72-76.
[5]
Wesson MD. Normalization of prism bar vergences[J]. Am J Optom Physiol Opt,1982,59(8):628-634.
[6]
Anderson H, Stuebing KK, Fern KD, et al. Ten-year changes in fusional vergence, phoria, and nearpoint of convergence in myopic children[J]. Optom Vis Sci,2011,88(9):1060-1065.
[7]
Antona B, Barrio A, Barra F, et al. Repeatability and agreement in the measurement of horizontal fusional vergences[J]. Ophthalmic Physiol Opt,2008,28(5):475-491.
[8]
Ciuffreda MA, Ciuffreda KJ, Wang B. Repeatability and variability of near vergence ranges[J]. J Behav Optom,2006, 17:39-46.
[9]
Penisten DK, Hofstetter HW, Goss DA. Reliability of rotary prism fusional vergence ranges[J]. Optometry,2001,72(2):117-122.
[10]
Rouse MW, Borsting E, Deland PN, et al. Reliability of binocular vision measurements used in the classification of convergence insufficiency[J]. Optom Vis Sci,2002,79(4):254-264.