不同类型实验性屈光参差对使用Titmus、Randot和TNO立体视觉测试法测量的立体视觉效果的比较。
Comparison of the Effect of Different Types of Experimental Anisometropia on Stereopsis Measured with Titmus, Randot and TNO Stereotests.
作者信息
Nabie Reza, Andalib Dima, Khojasteh Hasan, Aslanzadeh Safieh A
机构信息
Nikookari Eye Center, Tabriz University of Medical Sciences, Tabriz, Iran.
Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
出版信息
J Ophthalmic Vis Res. 2019 Jan-Mar;14(1):48-51. doi: 10.4103/jovr.jovr_189_17.
PURPOSE
To assess the effect of experimental anisometropia and monovision on stereopsis using the Titmus, Randot, and TNO stereoacuity tests.
METHODS
Sixty adult volunteers were enrolled in the present study. Four different types of anisometropia-myopia, hyperopia, and astigmatism (both 90° and 45°)-were induced by placing trial lenses over the dominant eye (from 3 to 1 D). Stereoacuity was measured using the Titmus, Randot, and TNO tests.
RESULTS
In all the anisometropia types, stereopsis deteriorated with increase in anisometropia in the three stereoacuity tests performed ( < 0.001). The largest decrease in stereopsis was attributed to 3 D myopic anisometropia-6.51 ± 2.10, 6.59 ± 2.35, and 7.36 ± 1.89 arc seconds in Titmus circles, Randot circles, and TNO, respectively. Minimal change in stereopsis was observed in 1 D astigmatism of 45°.
CONCLUSION
Any type of anisometropia may reduce stereoacuity; this reduction is most noticeable with myopic anisometropia, especially in the TNO test, probably due to the lack of monocular cues.
目的
使用Titmus、Randot和TNO立体视锐度测试评估实验性屈光参差和单眼视对立体视的影响。
方法
本研究招募了60名成年志愿者。通过在优势眼上放置试验镜片（3至1 D）诱发四种不同类型的屈光参差——近视、远视和散光（90°和45°）。使用Titmus、Randot和TNO测试测量立体视锐度。
结果
在所有屈光参差类型中，在进行的三项立体视锐度测试中，随着屈光参差的增加，立体视均变差（<0.001）。立体视下降最大的是3 D近视性屈光参差——在Titmus圆圈测试、Randot圆圈测试和TNO测试中分别为6.51±2.10、6.59±2.35和7.36±1.89角秒。在45°的1 D散光中观察到立体视的最小变化。
结论
任何类型的屈光参差都可能降低立体视锐度；这种降低在近视性屈光参差中最为明显，尤其是在TNO测试中，可能是由于缺乏单眼线索。
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