Vernon S A, Henry D J, Jones S J
University of Nottingham, Academic Unit of Ophthalmology.
Br J Ophthalmol. 1990 Apr;74(4):220-2. doi: 10.1136/bjo.74.4.220.
Suprathreshold field screeners are in common use for the detection of glaucomatous field loss. The predictive power of a positive result (PP+) depends on the sensitivity and specificity of the screener in the population in which it is to be used. Using data from 755 normal individuals (1510 eyes), we calculated the PP+ of the Henson CFS2000 screening programme for a population aged 50 and over. 4.3% of normal eyes failed the screening programme. Ignoring one or two misses on the screening programme immediately adjacent to the disc reduced this figure to 1.3% and significantly improved the PP+ of the programme. Calculations of the PP+ at increasing glaucoma prevalence levels indicates this to be particularly relevant at low levels such as those encountered when screening middle aged and elderly populations. Optometrists should perform routine field analysis when screening for glaucoma provided they adhere to strict protocols.
超阈值视野筛查仪常用于检测青光眼性视野缺损。阳性结果（PP+）的预测能力取决于筛查仪在所使用人群中的敏感性和特异性。利用755名正常个体（1510只眼）的数据，我们计算了亨森CFS2000筛查方案在50岁及以上人群中的PP+。4.3%的正常眼筛查未通过。忽略紧邻视盘的筛查程序中的一两个漏检情况，这一数字降至1.3%，并显著提高了该程序的PP+。在青光眼患病率不断增加的水平上计算PP+表明，这在筛查中年和老年人群时遇到的低患病率水平时尤为相关。验光师在筛查青光眼时应进行常规视野分析，前提是他们遵守严格的方案。
