The Rabin Cone Contrast Test (CCT) is a revolutionary new color vision test sensitive enough to detect both hereditary and acquired deficiency. In November 2013 Barnard Levit Optometrists were the first clinic in the UK to introduce the Rabin Cone Contrast Test to enable precisde evaluation of their patients' colour vision.

Research shows Cone Function loss is affected early in disease, including: AMD, Diabetic Retinopathy, Glaucoma, Multiple Sclerosis, Parkinson’s Disease, Optic Neuritis, high-risk medications, such as Plaquenil, and macular pigment density loss.

This test is approved as the sole color vision test by the US Air Force.

 The CCT has sensitivity and specificity comparable to anomalascope testing and exceeds Pseudo Isochromatic Plate testing in experienced observers. The CCT provides a rapid (6 miniutes) clinically expedient, measure of colour vision for quantifying normal colour performance, diagnosing and quantifyng severity of heriditary colour vision deficiency, and detection of aquired colour vision sensitivity loss due to ocular, neurological and/or systemic disease as will as injury or physiological stressors such as altitude and fatigue. (Invest Ophthalmol Vis Science, 2011, 52; 816-820).

Barnard Levit Optometrists use this test to:

  • diagnose the type and severity of heriditary colour vision defects to enable advice to be provided regarding career choice and to enable parents to inform the school of the colour vision anomaly
  • assist in the diagnosis of a wide range of eye, neurological and systemic conditions
  • provide accurate information to patients wishing to obtain commercial or private pilot's licence