Gramer E, Roesen B, Siebert M
Universitäts-Augenklinik, Würzburg, Bundesrepublik Deutschland.
Fortschr Ophthalmol. 1991;88(5):538-45.
The glaucoma patient can perceive his or her visual field loss subjectively with snow field campimetry with the Tübingen electronic campimeter (TEC). The sensitivity of this new method of examination for glaucoma has not previously been evaluated. We were interested in finding whether absolute and relative scotomas could be detected with such high probability that snow field campimetry could be used as a screening method for the early detection of glaucoma. Analysis of the severity of scotoma is not possible, so that snow field perimetry can indeed by regarded as a screening procedure. A total of 76 eyes of 76 patients with glaucoma and stage I-IV visual field loss and 20 eyes of 20 patients with ocular hypertension were examined with threshold determining static perimetry (Octopus or Humphrey perimeter) and with the snow field of the TEC in controlled conditions. A qualitative comparison was drawn to evaluate how often a pathologic or normal finding was confirmed by snow field campimetry: of the 76 eyes affected by scotoma, 65 eyes (85.5%) showed pathologic findings consistent with the result of snow field campimetry, and 11 eyes showed normal findings. The visual field loss was 63.6% for glaucomatous visual field loss stage I: 90.9% for glaucomatous visual field loss stage II, and 95% for visual field loss stages III and IV. For 16 of the 20 eyes with ocular hypertensions normal findings were reported with snow field campimetry. Snow field campimetry is suitable for use as a quick screening procedure, but only for absolute glaucomatous scotomas.
青光眼患者使用图宾根电子视野计（TEC）进行雪地视野计检查时，能够主观感知其视野缺损情况。此前尚未评估这种青光眼检查新方法的敏感性。我们想了解是否能以高概率检测出绝对和相对暗点，从而使雪地视野计可作为青光眼早期检测的筛查方法。由于无法分析暗点的严重程度，所以雪地视野计确实可被视为一种筛查程序。在可控条件下，对76例患有青光眼且视野缺损处于I - IV期的患者的76只眼睛，以及20例患有高眼压症的患者的20只眼睛，分别用阈值确定静态视野计（Octopus或Humphrey视野计）和TEC的雪地视野计进行了检查。通过定性比较来评估雪地视野计确认病理或正常结果的频率：在76只受暗点影响的眼睛中，65只眼睛（85.5%）显示出与雪地视野计结果一致的病理结果，11只眼睛显示正常结果。青光眼视野缺损I期的视野缺损率为63.6%，II期为90.9%，III期和IV期为95%。在20只患有高眼压症的眼睛中，有16只眼睛通过雪地视野计检查报告为正常结果。雪地视野计适合用作快速筛查程序，但仅适用于绝对青光眼性暗点。
