Katsumi O, Chedid S G, Kronheim J K, Henry R K, Jones C M, Hirose T
Children's Vision Center, Schepens Eye Research Institute and the Schepens Retina Associates, Boston, Mass 02114, USA.
Acta Ophthalmol Scand. 1998 Feb;76(1):50-5. doi: 10.1034/j.1600-0420.1998.760109.x.
We analyzed the correlation between the Preferential Looking (PL) acuities and the Visual Ability Scores (VAS) of 600 patients (many with severe retinopathy of prematurity) to determine their ability to perform various activities within the daily environment.
Visual acuity was measured by PL. Sixteen visual activities within the environment were analyzed. The VAS (range, 1-16) were calculated from the results of each activity and correlated with PL acuity.
The PL acuities of the 600 patients ranged from 20/20 (1.0) to <20/3200 (0.006) [mean, 20/337(006)]. The VAS ranged from 1 to 16 points (mean, 10.65; SD, +/-4.80) and showed a high correlation with the PL acuities (r=0.917, p=0.0001).
In addition to PL vision testing, analyzing the environmental visual behavior of young, severely visually impaired patients is important to accurately evaluate visual abilities. We found the VAS to be an important aid for low-vision specialists, especially for those with no access to a vision evaluation system such as PL.
我们分析了600例患者（其中许多患有严重的早产儿视网膜病变）的优先注视（PL）视力与视觉能力评分（VAS）之间的相关性，以确定他们在日常环境中进行各种活动的能力。
通过PL测量视力。分析了环境中的16项视觉活动。根据每项活动的结果计算VAS（范围1 - 16），并将其与PL视力相关联。
600例患者的PL视力范围为20/20（1.0）至<20/3200（0.006）[平均值，20/337(0.06)]。VAS范围为1至16分（平均值，10.65；标准差，±4.80），与PL视力显示出高度相关性（r = 0.917，p = 0.0001）。
除了PL视力测试外，分析年轻严重视力受损患者的环境视觉行为对于准确评估视觉能力很重要。我们发现VAS对低视力专家是一个重要的辅助工具，特别是对于那些无法使用如PL这样的视力评估系统的专家。
