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Preliminary observations on the recovery of different types of stereoscopic vision during treatment for amblyopia |
FU Tao,SU Qing,Xi Ping,LU Wei,WANG Li-li |
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Abstract Objective To investigate the recovery of distance stereopsis, zero disparity, crossed disparity and uncrossed disparity in ametropic amblyopic and anisometropic amblyopic children. Methods In this prospective consecutive case study, the best distance corrected visual acuity of 58 amblyopic children was tested during treatment. Zero disparity, crossed disparity and uncrossed disparity were measured by Yan′s random dot stereogram; distance stereopsis was detected by synoptophore. Data were analyzed with linear regression. Results Patients who had better visual acuity before treatment or those whose visual acuity increased quickly during treatment had better recovery of stereoscopic vision [regression equation for zero disparity and visual acuity before treatment was Y=-0.92X+3.13 (F=9.203, P<0.01); regression equation for zero disparity and visual acuity at the completion of treatment was Y=-0.81X+3.23(F=9.886, P<0.01)]. With the improvement in visual acuity, distance stereopsis recovered earlier than near stereopsis, and zero disparity, crossed disparity and uncrossed disparity recovered in order. Conclusion Distance stereopsis, near zero disparity, crossed disparity and uncrossed disparity recovered in order with the improvement of visual acuity in amblyopic children.
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Received: 23 September 2013
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