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Investigation of Binocular Vision Before and After Intraocular Lens Implantation in Cataract Patients

TANG Xiao zhou, ZHANG Zheng ping, YANG Wen hui (Zhongshan Ophthalmic Center, Sun Yat sen University of Medical Sciences, Guangzhou,510060, China)$$$$  
Objective To study the binocular vision and the related factors before and after the phacoemulsification(phaco)and intraocular lens (IOL)implantation. Methods 46 senile cataract patients undergoing phaco and IOL implantation from September to December 1997 were collected.The distant stereoacuity(SA) and the near SA were examined before and after the operations and with self controlled contrast. The patients were tested with the Lui's binocular aniseikonia test charts. The correlation of the postoperative recovery of stereopsis with VA,the binocular VA difference, the amount of aniseikonia and age were discussed. Results ① Postoperative binocular vision was greatly elevated than the binocular vision before operation. ② The postoperative VA and the difference of binocular VA were more important to postoperative SA;the amount of aniseikonia is less important to SA; and the age is the least important to SA recovery. ③ The postoperative visual acuity(VA)≥0.6 group are significantly better than the VA0 6 group. The SA of the group with similar postoperative binocular VA(binocular VA difference ≤3 line)is significantly better than that with more different binocular VA(binocular VA difference3 line). Conclusion The postoperative VA and difference of binocular VA are most important to SA recovery. The better the postoperative VA, and the less the difference of binocular VA, the better the recovery of stereopsis.
【CateGory Index】: R7761;R7782
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