实验性屈光参差对近视眼患者视功能的影响

目的 探讨实验性屈光参差对大于40岁近视眼患者双眼视功能的影响.方法 对大于40岁近视患者104人采用综合验光仪在单眼前加不同度数正球镜的方法,诱导单纯近视性(+0.5 D,+1 D,+1.5 D,+2 D,+2.5 D,+3 D)屈光参差.测定诱导屈光参差后的远视力、双眼同时视、融像功能、立体视状况.结论 ①屈光参差的增加>1.5 D时,欠矫眼的远视力随着屈光参差度数的增加逐渐下降(P<0.01);②屈光参差的增加>1.5 D时,立体视随着屈光参差度数的增加而下降(P<0.01);③屈光参差的增加>1.5 D时,融合功能随着屈光参差度数的增加而下降(P<0.05);④屈光参差的增加>2.0 D时,同时视随着屈光参差度数的增加而下降(P<0.01).结论近视性屈光参差可引起中年近视患者双眼视功能异常,当屈光参差>1.5 D时可引起双眼视功能急剧下降.大于40岁近视患者行屈光手术可留有<1.5 D近视性屈光参差,利于视近,且对高级视功能的影响不明显.

Study of binocular visual function's change after induced anisometropia of myopic patients

Objective To evaluate the effect of experimental anisometropia on binocular function of myopic patients who were over 40 years old. Methods Different power spherical lenses were added by phoroptor in 32 myopic patients with normal binocular function to induce simple myopia ( + 0. 5 D, +1 D, +1.5 D , +2 D, +2. 5 D, +3 D) anisometropia. The visual acuity,stereoscopic vision,Worth 4 dots fusional function and simultaneous vision were assessed after inducing the anisometropia. Results When the anisometropia exceeded 1.5 D, the distance vision acuity of low corrected eye decreased with increase of the amount of anisometropia ( P < 0. 01). When the anisometropia exceeded 1. 5 D, the stereoscopic vision decreased (P <0. 01) with increase of the amount of anisometropia. When the anisometropia exceeded 1.5 D, the fusional function weakened (P <0. 05) with increase of the amount of anisometropia. When the anisometropia exceeded 2.0 D, the simultaneous vision weakened(P <0. 01) with increase of the amount of anisometropia too. Conclusion Experimental anisometropia could result in abnormal binocular visual function for middle-aged myopic patients. When the power of anisometropia exceeded 1.5 D, high class visual function declined rapidly.