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Color Vision Recorder

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Vision Inspector Pro

 

Background info

Aniseikonia

Color vision defects

Color vision testing

 

Color Vision Recorder™

 

Additional information

Color Vision Recorder software

Main software features

  • Color vision testing and/or scoring of:
    • FM100 test
    • Farnsworth panel D15 test
    • Lanthony desaturated D15 test
  • User friendly graphical user interface, including database functionality
  • Monitor color calibration tool*
  • Automatic plotting of the horse-shoe diagram of the D15 tests and the error score polar graphs of the FM100 test (replaces manual score sheets)
  • Automatic analysis (fail/pass, protan, deutan, or tritan)
  • Calculation of quantitative color confusion scores based on:
    - the Bowman method [1,2]
    - Vingrys/King-Smith method [3,4]
    - Kinnear and Sahraie Total Error Score norms [5]

  • Independent research
    At the American Academy of Optometry Kundert & Citek showed that the Color Vision Recorder gives:

    • statistically the same results.
    • additional advantages
    compared to conventional hardware D15 tests.  Read abstract at AAO website here.
    A patient history graph to see at a glance if your patient (with an acquired color deficiency) is stable over time.
  • An export function to transfer all the data to for example Excel.
  • A USB dongle for copy-protection, allowing you to use the software on any computer as long as the dongle is attached.

 

 

Comparison with conventional D15 and FM100 tests

  Conventional tests Color Vision Recorder 
- Plotting of the results
- Storage of the results
- Analysis of the results
- Color confusion scoring
- History graphing
- Non-degrading advantage (see below)		 manual
manual
'manual'
no
no
no		 automatic
automatic
automatic
yes
yes
yes

 
The difference in approach: The intended FM100 and D15 colors in the conventional tests are obtained by illuminating certain Munsell colors with an illuminant C light source (see image below).  In the Color Vision Recorder tests the colors of the caps are represented by their basic CIE color coordinates.  To transform these color coordinates into the intended colors on a certain computer monitor, the color characteristics of this monitor must be known.  Therefore, the Color Vision Recorder contains a color calibration tool that will characterize the monitor according to the standards of the ICC.
      The inherent difference in how the intended colors are obtained in the conventional D15 and FM100 tests compared to the Color Vision Recorder tests, results in an important advantage for the Color Vision Recorder:  The Color Vision Recorder tests cannot degrade over time.  The colors on the monitor may start to deviate from the intended colors if there are changes in the computer or monitor, but this does not lead to a replacement of the tests.  A quick re-calibration of the monitor colors will make the tests fully operational again.
     In the conventional D15 and FM100 tests, on the other hand, discolorations of the caps may arise from light exposure and finger contact (dirt/grease).  This will eventually lead to a necessary replacement of the tests.

  

 

 

More information

More information can be obtained from:

 

 

References

  1. K.J. Bowman, "A method for Quantitative scoring of the Farnsworth Panel D-15," Acta Ophthalmologica 60, 907-916 (1982)

  2. K.J. Bowman, et al., "The effect of age on performance on the panel D-15 and desaturated D-15: A Quantitative Evaluation," in Color Vision Deficiencies VII, 227-231 (1984)

  3. A.J. Vingrys and P.E. King-Smith, "A quantitative scoring technique for panel tests of color vision," Inv. Ophth. & Vis. Sc. 29, 50-63 (1988)

  4. D.A. Atchison, et al. "Quantitative scoring methods for D15 Panel tests in the diagnosis of congenital color vision deficiency," Optometry and Vision Science 68, 41-48 (1991)

  5. P.R. Kinnear and A. Sahraie, "New Farnsworth-Munsell 100 hue test norms of normal observers for each year of age 5-22 and for age decades 30-70," Br J Ophthalmol. 86, 1408-1411 (2002)

 

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* The calibration tool included is software-based.  If desired it is also possible to use an external hardware monitor calibration tool (not included), such as XRite's i1Display 3.  Optical Diagnostics does not accept any liability for calibration errors and does not warrant that the tests will be accurate and statistically the same as their 'hardware' counterparts. The accuracy may, for example, depend on the accuracy at which you calibrate your monitor and the spatial and angular color uniformity of the monitor.