Abstract:

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 myopic anisometropia on the binocular visual function were observed. Results   The mean level of heterophoria was increased when anisometropia exceeded 1.50D (P<0.05 ), and there was no significant change when it was less than 1.50D (P>0.05 ). When anisometropia exceeded 1.50D, the positive numbers of simultaneous vision, fusion and stereopsis were decreased with the increase of anisometropia degree (P<0.05 ). Conclusion   Myopic anisometropia can cause abnormality of binocular visual function, and when anisometropia exceeds or is equal to 1.50D(≥1.50D) 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 <1.50D myopic anisometropia to get a satisfactory effect in both hyperopia and myopia without influencing the senior visual function.

Key words: Anisometropia; Monocular vision; Visual function； Cataract; Artificial lens