Relationships of exophoria, ocular dominance and stereopsis after monovision induced by intraocular lens implantation

概要

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Objective : To investigate the effects of exophoria and ocular dominance on stereopsis in intraocular lensimplantable monovision patients. Materials and Methods : Twenty patients with pseudophakic monovision (difference in refraction : 2.06 diopters (D) ± 0.56) were divided into 2 groups using the red/green anaglyph stereotest (TNO) 11 with good stereopsis (within 120 seconds) and 9 with poor stereopsis (240 seconds or over). The angle of exophoria was measured by the alternate prism cover test (APCT) before and after cataract surgery. For quantitative measurement of ocular dominance, the difference in perception time between the left and right eyes was measured using our original ocular dominance measurement system with a retinometer. Results : The angle of exophoria in near fixation was not greater than 10^△ in all patients in the good stereopsis group, but in 4 of the poor stereopsis group cases was more than 10^△, showing a significant difference (Mann-Whitney U test, P = .0085). Regarding ocular dominance, the difference of perception time was 2.45 ± 1.29 seconds in the good stereopsis group and 5.33 ± 1.73 seconds in the poor stereopsis group (intergroup significant difference; P = .0015). Conclusions : Measurement of angle of exophoria and difference of perception time is useful for evaluating the applicability of monovision correction.
北里大学の論文
2005-09-30