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ColorDx CCT-HD color vision diagnostics

military-grade, cone-isolation contrast sensitivity

ColorDx® CCT-HD™

Developed by and licensed to Konan Medical in collaboration with the United States Air Force, School of Aerospace Medicine OBVA (Operational Based Vision Assessment) laboratory under CRADA, CCT-HD represents the new gold standard for color vision diagnostics.

Featuring a robust Bayesian thresholding technique, "Psi-marginal Adaptive", CCT-HD expands on the strengths of the USAF original cone-isolation contrast test (CCT) and is built from the ground up with entirely new architecture. Highlights include:

  • Cone-Isolation, contrast sensitivity methodology
  • "Landolt C" based test strategies
  • Simple to use 4-button response pad
  • Robust thresholding and derivation of statistic standard error
  • Konan custom-calibrated IPS display technology
  • Rapid, intuitive, staged calibration
  • Expanded low-contrast range testing
  • High fidelity cone-contrast granularity
  • Expansive illustrated reporting
  • Auto trends analysis
  • Contrast Sensitivity (achromatic) with auto AUC calculation
    (Coming Soon!)
  • … and much more

FDA listed | CPT Code 92283 | CE | TGA | Health Canada

Clinical Benefits of Diagnostic Color Vision Testing

1 in 5 may have a color vision deficiencyTritan (S-cone or blue-yellow type) deficiencies are rarely genetic, yet may affect up to 15%* of the general population. Acquired deficiencies are commonly S-cone type, but may also affect L and M-cones. Acquired deficiencies are gender neutral and become more common with age.

This important but often overlooked clinical sign may be caused by retinal, optic nerve, trauma or neurological disorders, in addition to cataracts and high-risk meds, as well as hundreds of common drugs and substances**.

High-definition, cone-isolation contrast testing provides a detailed assessment (with a numeric score) of each, individual, cone-cell population.  The contrast “Threshold” scores as well as associated “Standard Error”, may be particularly useful to quantify cone-contrast performance as well as for assessing changes over time from acquired deficiencies that may have been otherwise clinically been missed entirely.

Testing for acquired color vision deficiencies may be one of the most underutilized measures of functional vision. Commonly used color vision tests historically (such as printed pseudo-isochromatic “Ishihara plates” designed a century ago), may only test genetic L and M-cone deficiencies, completely missing all S-cone (blue) deficiencies as well as being not quantitative.

Contemporary eyecare includes qualitative and quantitative assessment of this important measure of functional vision.  ColorDx CCT-HD is the state-of-the-art system to assess color vision deficiencies in high-definition.

*Rayman, R., et al. Rayman’s Clinical Aviation Medicine. Castle Connelly. 2013.
**Fraunfelder, Fraunfelder, Chambers. Clinical Ocular Toxicology. Sanders Elsevier, 2008: 320. Clinical Ocular Toxicology, Substances and Pharmaceutical Agents that can Cause Color Vision Defects.