Wall M, Lefante J, Conway M
Department of Psychiatry and Neurology, Tulane University School of Medicine, New Orleans, Louisiana.
Invest Ophthalmol Vis Sci. 1991 Nov;32(12):3091-5.
High-pass resolution perimetry, or the "ring test," is a recently developed type of acuity perimetry. To determine its test-retest variability, we studied 10 normals and 10 patients with idiopathic intracranial hypertension (IIH) by testing both eyes four separate times. There was no increase in variability from the center out to 21 degrees of visual field eccentricity. However, there was a significant increase from 22 degrees to 29 degrees in both normals and IIH patients. Unlike light sensitivity threshold automated perimetry, with an increase in threshold level there was no significant increase in variability in either normals or patients. This may be because of the test's method, which thresholds by target size rather than intensity. As expected, there was a large intersubject variability in the patients, with the visual fields being significantly disturbed by analysis of total field, quadrants, concentric rings, and anatomic nerve fiber bundle regions. Surprisingly, there was no significant difference in the total within subject variability of normals and patients. Because with the ring test there is no increase in variability with an increase in threshold, this method of perimetry may have great utility for following patients with disturbed visual fields. The ring test appears to have advantages that promote low test-retest variability.
高通分辨率视野检查法，即“环形测试”，是一种最近开发的视力视野检查法。为了确定其重测变异性，我们对10名正常人和10名特发性颅内高压（IIH）患者进行了研究，对双眼分别进行了4次测试。从中心到视野偏心度21度，变异性没有增加。然而，在正常人和IIH患者中，从22度到29度变异性都有显著增加。与光敏感度阈值自动视野检查法不同，随着阈值水平的增加，正常人和患者的变异性均无显著增加。这可能是由于该测试的方法，它是根据目标大小而非强度来确定阈值的。正如预期的那样，患者之间存在很大的个体差异，通过对整个视野、象限、同心环和解剖学神经纤维束区域的分析，视野受到了显著干扰。令人惊讶的是，正常人和患者在个体内总变异性方面没有显著差异。由于采用环形测试时，随着阈值增加变异性不会增加，这种视野检查方法对于跟踪视野受损的患者可能具有很大的实用价值。环形测试似乎具有促进低重测变异性的优点。
