Effect of vision training on patients with functional visual loss
Jiang Yanglin,Li Lihua,Wang Rui,Nan Li
Tianjin Eye Hospital, Tianjin Key Lab of Ophthalmology and Vision Science, Clinical College of Ophthalmology Tianjin Medical University Tianjin Eye Institute, Tianjin 300020, China
Objective To evaluate the efficacy of vision training on functional vision loss and to analyze binocular vision characteristics in patients. Methods This retrospective study was performed at the ophthalmic center, Tianjin Eye Hospital from July 2012 to October 2013. Twenty patients with functional vision loss were enrolled, including 10 males and 10 females. The average age was 11.2±5.9 years. All patients had routine examinations that excluded eye disease, amblyopia risk factors, and systemic disease. Based on the binocular vision characteristics, all patients participated in personalized vision training. All data were statistically analyzed with a paired samples t test and Pearson correlations. Results Right eye refraction of patients ranged from +2.25 to -8.75 D; left eye refraction ranged from +2.87 to -8.63 D. Thirteen patients had convergence insufficiency, 4 had accommodative excess, 2 had basic exophoria and 1 had divergence insufficiency. After 2 months of vision training, distance and near vision in all patients had improved to 1.0 (Z=-3.948, P<0.01; Z=-3.193, P<0.01). Near positive relative vergence (PRV) break point improved as well (t=-5.173, P<0.01). Additionally, monocular accommodative facility (MAF, Z=3.928, P<0.01), binocular accommodative facility (BAF, Z=-3.835, P<0.01), positive relative accommodation (PRA, t=4.094, P<0.01), and negative relative accommodation (NRA, t=-4.254, P<0.01) had significantly improved. In addition, both distance vision (r=-0.584, P<0.01; r=-0.658, P<0.01) and near vision (r=-0.451, P<0.01; r=-0.540, P<0.01) were correlated with far exophoria and near positive relative vergence. Conclusion The occurrence of functional vision loss is apparently related to binocular vision dysfunction in these patients. Visual acuity can be improved with vision training.
江洋琳,李丽华,王睿,南莉. 视觉训练对功能性视力下降患者的疗效[J]. 中华眼视光学与视觉科学杂志, 2015, 17(2): 92-95.
Jiang Yanglin,Li Lihua,Wang Rui,Nan Li. Effect of vision training on patients with functional visual loss. Chinese Journal of Optometry Ophthalmology and Visual science, 2015, 17(2): 92-95. DOI: 10.3760/cma.j.issn.1674-845X.2015.00.007
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