Henson D B, Dix S M, Oborne A C
Br J Ophthalmol. 1984 Jul;68(7):458-62. doi: 10.1136/bjo.68.7.458.
Normal subjects when examined with the Friedmann Mark II Analyser often miss stimuli in the extreme (greater than 20 degrees) superior field and in the arcuate regions. The majority of misses in the superior field are believed to result from the subjects' eyelashes acting as partial occluders. The misses in the arcuate region are believed to be the result of the retinal blood vessels. Isolated missed points at 0.8 or more log unit above threshold were found in 9% of the subjects, which means that it is 13 times more likely that an isolated missed point comes from a normal subject than a glaucomatous one (the incidence of glaucoma is taken as 0.7% of the total population). Clusters of two missed stimuli in the arcuate region at 0.4 and 0.6 log unit above threshold were found in 8% and 0% of the population. Clusters of three missed stimuli in the arcuate region were found in 0.7% of the population. It is suggested that isolated missed stimuli should be retested with the eccentric fixation point.
正常受试者使用弗里德曼Mark II分析仪进行检查时，常常会遗漏视野最上方（大于20度）以及弓形区域的刺激信号。视野上方的大多数遗漏被认为是受试者的睫毛起到了部分遮挡作用所致。弓形区域的遗漏被认为是视网膜血管造成的。在9%的受试者中发现了高于阈值0.8或更多对数单位的孤立遗漏点，这意味着孤立遗漏点来自正常受试者的可能性是来自青光眼患者的13倍（青光眼发病率占总人口的0.7%）。在8%和0%的人群中发现了弓形区域高于阈值0.4和0.6对数单位的两个遗漏刺激信号簇。在0.7%的人群中发现了弓形区域三个遗漏刺激信号簇。建议对孤立的遗漏刺激信号用偏心注视点进行重新测试。
