实验近视性屈光参差对双眼视功能的影响

Influence of experimental myopic anisometropia on binocular visual function

目的研究诱导近视性屈光参差对双眼视功能的影响。方法选择漳州卫生职业学院等3所学校40岁以上教师64人,在眼前放置正球镜诱导单纯近视性屈光参差,观察屈光参差大小对双眼视功能的影响。结果水平隐斜视的均值在屈光参差超过1.50 D时增大(P<0.05),小于1.50 D时没有明显变化(P>0.05);屈光参差超过1.50 D时,同时视、融合、立体视的阳性人数均随着屈光参差度数的增加而减少(P<0.05)。结论近视性屈光参差可引起双眼视功能异常,当屈光参差≥1.50 D时可引起双眼视功能急剧下降。按照单眼视设计白内障术后植入的人工晶体屈光度时,可留有<1.50 D近视性屈光参差,兼顾视远和视近,以免影响高级视功能。

Objective To investigate the change of binocular visual function after induction of myopic anisometropia. Methods Pure myopic anisometropia was induced by putting spectacles on the right eyes of 64 teachers who were more than 40 years old from Zhangzhou Health Vocational College and another two colleges, and the effects of my- opic anisometropia on the binocular visual function were observed. Results The mean level of heterophoria was in- creased when anisometropia exceeded 1.50 D （P 〈 0.05 ）, and there was no significant change when it was less than 1.50 D （ P 〉 0.05 ）. When anisometropia exceeded 1.50 D, the positive numbers of simultaneous vision, fusion and stereopsis were decreased with the increase of anisometropia degree （ P 〈 0.05 ）. Conclusion Myopic anisometropi- a can cause abnormality of binocular visual function, and when anisometropia exceeds or is equal to 1.50 D（ ≥ 1.50 D） it may cause a sharp decline of the binocular visual function. So when we design cataract surgery according to the monocular vision, the implantation of intraocular lens diopter should have a 〈 1.50 D myopic anisometropia to get a satisfactory effect in both hyperopia and myopia without influencing the senior visual function.