Zahiruddin Kowser, Banu Shaj, Dharmarajan Ramya, Kulothungan Vaitheeswaran, Vijayan Deepa, Raman Rajiv, Sharma Tarun
Elite School of Optometry, Sankara Nethralaya, Chennai, Tamil Nadu, India.
Korean J Ophthalmol. 2010 Jun;24(3):159-62. doi: 10.3341/kjo.2010.24.3.159. Epub 2010 Jun 5.
To evaluate a customized, portable Farnsworth-Munsell 100 (FM 100) hue viewing booth for compliance with colour vision testing standards and to compare it with room illumination in subjects with normal colour vision (trichromats), subjects with acquired colour vision defects (secondary to diabetes mellitus), and subjects with congenital colour vision defects (dichromats).
Discrete wavelengths of the tube in the customized booth were measured using a spectrometer using the normal incident method and were compared with the spectral distribution of sunlight. Forty-eight subjects were recruited for the study and were divided into 3 groups: Group 1, Normal Trichromats (30 eyes); Group 2, Congenital Colour Vision Defects (16 eyes); and Group 3, Diabetes Mellitus (20 eyes). The FM 100 hue test performance was compared using two illumination conditions, booth illumination and room illumination.
Total error scores of the classical method in Group 2 as mean+/-SD for room and booth illumination was 243.05+/-85.96 and 149.85+/-54.50 respectively (p=0.0001). Group 2 demonstrated lesser correlation (r=0.50, 0.55), lesser reliability (Cronbach's alpha, 0.625, 0.662) and greater variability (Bland & Altman value, 10.5) in total error scores for the classical method and the moment of inertia method between the two illumination conditions when compared to the other two groups.
The customized booth demonstrated illumination meeting CIE standards. The total error scores were overestimated by the classical and moment of inertia methods in all groups for room illumination compared with booth illumination, however overestimation was more significant in the diabetes group.
评估一种定制的便携式 Farnsworth-Munsell 100（FM 100）色调观察箱是否符合色觉测试标准，并将其与正常色觉受试者（三色视者）、后天性色觉缺陷受试者（继发于糖尿病）和先天性色觉缺陷受试者（二色视者）的室内照明进行比较。
使用分光计采用正入射法测量定制观察箱中灯管的离散波长，并与太阳光的光谱分布进行比较。招募了 48 名受试者进行研究，分为 3 组：第 1 组，正常三色视者（30 只眼）；第 2 组，先天性色觉缺陷（16 只眼）；第 3 组，糖尿病（20 只眼）。使用两种照明条件（观察箱照明和室内照明）比较 FM 100 色调测试性能。
第 2 组经典方法在室内照明和观察箱照明下的总误差分数均值±标准差分别为 243.05±85.96 和 149.85±54.50（p = 0.0001）。与其他两组相比，第 2 组在两种照明条件下经典方法和惯性矩方法的总误差分数相关性较低（r = 0.50，0.55）、可靠性较低（Cronbach's alpha，0.625，0.662）且变异性较大（Bland & Altman 值，10.5）。
定制观察箱的照明符合 CIE 标准。与观察箱照明相比，所有组在室内照明下经典方法和惯性矩方法的总误差分数均被高估，然而在糖尿病组中高估更为显著。
