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LI YAN, JING FU, HANG CHU, WEI LU, SHASHA PANG, DIANPENG WU; Exploring the relationship between the visual acuity interocular differences and stereopsis in strabismus and amblyopia patients. Journal of Vision 2017;17(10):1066. doi: 10.1167/17.10.1066.
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© ARVO (1962-2015); The Authors (2016-present)
By measuring the visual acuity interocular differences and functional deficits of fine stereopsis in amblyopia and strabismus & amblyopia patients with coarse stereopsis to study the relationship between acuity interocular differences, stereopsis and disease patterns, from the perspective of spatial resolution, binocular integration and interaction. 233 patients with amblyopia and strabismus & amblyopia , age around 4 to 17 years old, participated in the present study. The performances of visual functions in patients under various conditions were measured by using random-dot-coarse and –fine stereopsis model. According to the grade separation, stereopsis was classified into 2 types: typeⅠ-with both coarse and fine stereopsis, type Ⅱ -with coarse but without fine stereopsis. There are 105 amblyopia and 19 strabismus & amblyopia in typeⅠ, while 80 amblyopia and 39 strabismus & amblyopia in type Ⅱ. There is no significant correlation in the visual acuity interocular differences (vIODs) of amblyopia patients between typeⅠand Ⅱ（t=0.068）. However, vIODs of strabismus & amblyopia patients in type I and II showed significant correlation （t=0.011）,with vIODs mean of 0.10,0.24. There is no correlation in vIODs between strabismus & amblyopia and amblyopia patients of typeⅠ（t=0.258）nor type Ⅱ （t=0.496）. The stereopsis and binocular vIODs in amblyopia classified above showed no correlations, while there is significant correlations between vIODs and the existence of fine stereopsis in strabismus & amblyopia. Mean vIODs of typeⅠis 0.14 less than that of type Ⅱ. There is no relevance between binocular integration and spatial resolution differences on stereopsis level in amblyopia, in which deficits of binocular channel noise processing is dominate. Strabismus & amblyopia has binocular visual functioning deficits due to the poor binocular central control ability, combined with binocular channel noise processing deficits that directly influences IODs of interocular spatial resolution.
Meeting abstract presented at VSS 2017
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