Assessment of visual function in monovision (To elucidate the relation between the magnitude of ocular dominance and binocular rivalry)

1.对69例人工晶状体眼单眼视功能的可接受性进行了研究。眼优势用“卡片穿孔试验”确定。优势眼进行远距离矫正，非优势眼进行近视矫正。主观满意度采用问卷调查。双眼等效球镜屈光度之差为2.29D。双眼裸眼视力在各距离均大于或等于20/25，尤其是中距离视力超过单眼两行或两行以上。双眼对比敏感度总和为0.5- 2.0cpd，55%的近立体视小于或等于100弧秒。75%的患者获得了高度满意的结果，佩戴光学辅助器的依赖性仅为17%。这些结果表明人工晶状体单视是补偿白内障术后调节功能丧失的良好方法。2.我们研制了一种定量评估眼优势的装置。3.为探讨眼优势度与眼偏斜的关系，对43例外斜视[XT]、间歇性外斜视[X（T）]、外隐斜视[X]患者进行双眼竞争时的独占视度检查。优势眼与非优势眼的排他视度之差分别为XT 8.9 ± 4.1秒、X（T）5.1±4.2秒、X 2.3±1.6秒。XT与X（T）之间有显著性差异（p<0.05），XT与X之间有显著性差异（p<0.01）。如先前已经报道的，一只眼睛的图像的较长的独占可见性指示较强的眼优势。眼偏向对眼优势有明显影响，随着双眼视觉异常机会的增加，一只眼的图像独占可见性延长。

1.We investigated visual function and acceptability in sixty-nine patients with pseudophakic monovision. Ocular dominance was determined by "hole in card test". The dominant eye was corrected for distance and the non-dominant eye was corrected for near. Subjective satisfaction was evaluated by the questionnaire. Difference of spherical equivalent refraction of both eyes was 2.29 D. In all-distance, most of patients had binocular uncorrected visual acuity of 20/25 or better, especially, in middle distance, two or more lines better than their monocular visual acuity. Binocular summation of contrast sensitivity was seen at 0.5-2.0 cpd. Near steropsis was less than or equal to 100 arc second in 55%. Highly satisfaction was obtained in 75% and wearing optical aid dependence was just 17%. These results indicate pseudophakic monovision is the excellent methods to compensate for the loss of accommodation after cataract surgery.2.We developed the device for assessment of ocular dominance quantitatively. In this device, interocular balance of dominancy is determined by the contrast of one eye's image reduced 20% step on binocular rivalry.3.To investigate the relation between ocular dominance and ocular deviations, 43 patients with exotropia [XT], intermittent exotropia [X(T)], exophoria [X] were examined the exclusive visibility in binocular rivalry. The differences of exclusive visibility between dominant eye and non-dominant eye were 8.9+4.1 sec in XT, 5.1±4.2 sec in X(T), 2.3±1.6 sec in X, respectively. There were significant differences between XT and X(T) (p<0.05) as well as between XT and X(p<0.01). As has been reported previously, longer exclusive visibility of one eye's image indicates stronger ocular dominance. It seems that ocular dominance was obviously influenced by ocular deviations since exclusive visibility of one eye's image was prolonged with increasing the opportunity of abnormal binocular vision.