title: A simple modification of the Farnsworth-Munsell 100-hue test for much faster assessment of color vision.
abstract: OBJECTIVE
  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.
  
  
  METHODS
  Prospective, comparative, observational study.
  
  
  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.
authors.forename: Supriyo
authors.initials: S
authors.lastname: Ghose
authors.forename: Dinesh
authors.initials: D
authors.lastname: Shrey
authors.forename: Pradeep
authors.initials: P
authors.lastname: Venkatesh
authors.forename: Twinkle
authors.initials: T
authors.lastname: Parmar
authors.affiliation: Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, India.
authors.forename: Sourabh
authors.initials: S
authors.lastname: Sharma
mesh_terms: D055253:Color Vision / Q000502:physiology*; D003936:Diagnosis, Computer-Assisted; D004867:Equipment Design; D006801:Humans; D011446:Prospective Studies; D014787:Vision Tests / Q000295:instrumentation*