Jenni A, Hirsbrunner H P
University Eye Clinic, Insel Hospital, Berne, Switzerland.
Jpn J Ophthalmol. 1990;34(3):280-90.
In the comparison of ten normal and two pathological visual fields, excellent agreement was found between examinations made with Octopus perimeters (types 201 and 500) and a prototype version of a new cupola-free perimeter (CFPP). The examination of a single glaucomatous visual field, however, exhibited an elevated mean defect value with the prototype instrument in comparison with Octopus 201 examinations of the same visual field. Although this difference may be easily explained by long-term fluctuation effects, further investigations based on a broader empirical basis will be required. Based on the results of this preliminary work the following remarks can be made with respect to the cupola-free perimeter: provided that the zero point of the dB scale is chosen appropriately, ie, with a stimulus luminance of about 4,000 asb used as the 0 dB level, the same differential light sensitivity (DLS) values for normal visual fields can be obtained with the CFPP as with all Octopus models (201, 500, 2000). Within the limits of measurement error, the same decrease of DLS was found with the CFPP as obtained using the other perimeters for test locations (of the G1 program), ranging from the center out to an eccentricity of 30 degrees. Thus it appears that the normal values as used in the other Octopus perimeters can also be utilized in this cupola-free instrument within this range.
在对10个正常视野和2个病理视野的比较中，发现使用Octopus视野计（201型和500型）与新型无圆顶视野计（CFPP）的原型版本进行的检查之间具有高度一致性。然而，对单个青光眼视野的检查显示，与使用Octopus 201对同一视野进行的检查相比，该原型仪器的平均缺损值有所升高。尽管这种差异可能很容易用长期波动效应来解释，但仍需要在更广泛的经验基础上进行进一步研究。基于这项初步工作的结果，对于无圆顶视野计可以得出以下结论：如果分贝刻度的零点选择得当，即使用约4000 asb的刺激亮度作为0分贝水平，则使用CFPP与所有Octopus型号（201、500、2000）对正常视野可获得相同的微分光敏感度（DLS）值。在测量误差范围内，使用CFPP发现的DLS下降与使用其他视野计（用于G1程序的测试位置）从中心到30度偏心度范围内所获得的下降相同。因此，似乎其他Octopus视野计中使用的正常值在此范围内也可用于这种无圆顶仪器。
