非器质性视觉丧失的 Goldmann 运动视野计刺激参数。
Stimulus parameters for goldmann kinetic perimetry in nonorganic visual loss.
机构信息
Department of Neuro-Ophthalmology and Strabismology, Kantonsspital, St. Gallen, Switzerland.
出版信息
Ophthalmologica. 2010;224(3):153-8. doi: 10.1159/000236041. Epub 2009 Sep 9.
OBJECTIVE
To investigate the influence of the stimulus parameters on perimetry at various distances and draw conclusions for the clinical exploration of nonorganic visual loss.
METHODS
Visual field testing using Goldmann kinetic perimetry was performed on 15 healthy volunteers. The I/1e isopter at 33 cm was compared to the I/1e, II/1e and I/2e isopters at 66 cm. The 0/1e isopter at 33 cm was compared to the 0/1e, I/1e and 0/2e isopters at 66 cm.
RESULTS
Doubling the examination distance without adjusting the stimulus parameters resulted in significant perimetric visual field constriction. Doubling the stimulus diameter resulted in perimetric visual field expansion by a factor of 2.26 and 3.32 for I/1e and 0/1e, respectively. Increasing stimulus luminance by a factor of 3.17 caused expansion by a factor of 2.15 and 2.32 for I/1e and 0/1e, respectively.
CONCLUSIONS
To avoid falsely diagnosing visual field constriction, stimulus parameters need to be adjusted when visual field testing is performed at double distance. Increasing stimulus luminance was more appropriate than augmenting stimulus size.
目的
研究刺激参数对不同距离视野检查的影响，为非器质性视觉丧失的临床探索得出结论。
方法
对 15 名健康志愿者进行 Goldmann 动态视野检查。将 33cm 处的 I/1e 等视线与 66cm 处的 I/1e、II/1e 和 I/2e 等视线进行比较。将 33cm 处的 0/1e 等视线与 66cm 处的 0/1e、I/1e 和 0/2e 等视线进行比较。
结果
在不调整刺激参数的情况下，将检查距离加倍会导致视野明显缩小。将刺激直径加倍，I/1e 和 0/1e 的视野分别扩大 2.26 倍和 3.32 倍。刺激亮度增加 3.17 倍，I/1e 和 0/1e 的视野分别扩大 2.15 倍和 2.32 倍。
结论
为避免误诊视野缩小，在双倍距离进行视野检查时需要调整刺激参数。增加刺激亮度比增加刺激大小更合适。
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