Abstract: Objective To discuss the factors affecting binocular vision by observing the effects of anisometropia and its correction vis LASIKand glasses.Methods LASIK were performed in patients with anisometropia during June 2003 and March 2005 in our hospital.In this program,43 cases were followed-up,of them 13 persons are males and 30 are females.The middle number of refractive difference wa 4.866±2.059(2.50 D～10.75 D);average refractive diopter was-7.55±3.33 D(-2.44～-16.00 D);average visual acuity of the naked eye was 0.08±0.07;the stereovision was examined before LASIKand 3 or 6 monthes after operation respectively.The standard was ≤60 s,central stereovision;80～800 s,lateral stereovision;0,stereo blind.The patients were divided into two groups by 4 Daccording to the refractive difference,to study the correction of anisometropia and the recovery of binocular vision.The data were analyzed by SAS.Results Two cases had normal stereovision,7 had peripheral stereovision and 34 were stereovision blind before LASIK.Three months after operation,15 had normal stereovision,23 had peripheral stereovision and 5 was stereovision blind.The 6 months result wa 23,16 and 4 respectively.Compare the stereopsis results of 3 and 6 months after operation with the results before operation(P<0.001),but the data collected between 3 and 6 months after operation had no statistical meaning.Three months after operation,4 patients got normal stereovision,18 patients got peripheral stereovision,4 patients had no stereovision in the group of >4 D.In the group of ≤4 D,the number was 11,5 and 1 respectively(P=0.0023),4 patients got normal stereovision,19 patients got peripheral stereovision,3 patients had no stereovision in the group of >4 D 6 months after operation while in the group of ≤4 D,the number was 12,4 and 1 respectively(P=0.0014).The stereovision results between with glasses and after operation was plus correlate,the stereovision outcome after operation was better than with glasses.Conclusion Adults with anisometropia could acquire not only normal fusion,but also got normal or partial stereopsis after LASIK,it is up to the corrected visual acuity,the degree of anisometropia and the results of binocular vision with glasses.

Key words: anisometropia, LASIK, binocular vision