A simple modification of the Farnsworth-Munsell 100-Hue test for much faster assessment of color vision.
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Date
2014-06
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Abstract
Purpose: The Farnsworth‑Munsell (FM) 100‑hue test is well known but is also time consuming, especially its
analytical component. To reduce this needless time‑waste during precious working hours, a simple modification
was devised. Design: Prospective, comparative, observational study. Materials and Methods: A transparent
clear plastic carrier box replaced the opaque one, allowing ready digital photodocumentation of top and
bottom without even opening the box, or handling/inverting the caps - 200 reportedly normals and 50 known
color vision defectives could be easily tested on this modified‑FM and results stored, allowing rapid turnover.
The captured scores with patient ID were analyzed, at leisure, outside hospital time, saving 45-60 minutes/
patient. After recording, the box was promptly handed over to the next subject for rearrangement. Times taken
for test/patient were recorded. Results: Running time was reduced from 60-75 min to ~15 min/patient with
no waste of invaluable lab hours. Turnover time is limited to capturing two photographs (~60 sec). The box is
relatively cheap and easy to maintain. Conclusions: Our simplified FM 100‑hue test allowed rapid assessment
of color visions with easy data storage of both top and bottom.
Description
Keywords
Color vision, color vision testing, color vision testing, FM 100‑Hue, Ishihara
Citation
Ghose Supriyo, Shrey Dinesh, Venkatesh Pradeep, Parmar Twinkle, Sharma Sourabh. A simple modification of the Farnsworth-Munsell 100-Hue test for much faster assessment of color vision. Indian Journal of Ophthalmology. 2014 June ; 62 (6): 721-723.