Validation of an Inexpensive Test Illuminant for Aeromedical Color Vision Screening

Details

• Creators:
  Milburn, Nelda J. ; Mertens, Henry W.
• Corporate Creators:
  Civil Aeromedical Institute
• Corporate Contributors:
  United States. Office of Aviation Medicine
• Subject/TRT Terms:
  Air Pilots Air Pilots--Certification Certification Color Blindness Color Vision Color Vision--Testing--Validity Daylight Human Subject Testing Lighting Validation Vision Tests

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• Publication/ Report Number:
  DOT/FAA/AM-93/16
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Civil Aerospace Medical Institute
• Abstract:
  An inexpensive illuminant for color vision screening suggested by the NRC-NAS Committee on Vision was evaluated as a substitute for the Macbeth Easel Lamp. The Macbeth Easel Lamp is the recommended illuminant for pseudoisochromatic plate tests used in aeromedical color vision screening, but is no longer in production. Subjects included both normal trichromats (p=145) and persons with varying degrees and types of color vision deficiencies (p=152) as diagnosed with the Nagel Type I anomaloscope.
  
  Subjects were given the Dvorine Pseudo-lsochromatic Plate Test illuminated by each of the two light sources. One Verilux True Color Light tube (F15T8VLX) was installed in an adjustable fluorescent desk lamp and position at a height of 24 in above the center of the Dvorine test book to give a 270 lux illumination to match the illumination produced by the Macbeth light source. The two presentations of the Dvorine were separated by several other color vision tests. Each subject was given a different random order of plates 2-15 for each light source. Pass/Fail performance with the Dvorine test was virtually the same with the two light sources when criterion for failure was 3 or more errors. The Verilux True Color Light obtained a Kappa value of .97, and very low false positive (.021) and false negative (.006) rates when compared to the Macbeth Easel Lamp. Performance and possible applications of the Verilux True Color Light in aeromedical color vision screening are discussed.
  
  
• Format:
  PDF
• Collection(s):
  FAA Civil Aerospace Medical Institute US Transportation Collection
• Main Document Checksum:
  urn:sha-512:71ac91261a05ffb68098829bc67dfd6517eb22b33e516654a1964e63e3e326c47a1a57136530201b4019ad1ba090ac782ee82a582be03fa99b5c15bbe4d807e9
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/21376/dot_21376_DS1.pdf
• File Type:
  [PDF - 902.98 KB ]