The CAD test was the company's first product in a series of tests that emerged from fundamental research studies designed to assess different aspects of visual performance. The CAD test employs a new approach to colour vision assessment and is based on a number of research studies carried out over several years at City University, London. The test relies on novel techniques that isolate the use of colour signals and employs templates based on the statistical distribution of red/green and yellow/blue colour thresholds measured in 333 subjects with "normal" colour vision and the observed patterns of colour vision loss measured in hundreds of subjects with colour vision deficiencies (either congenital, or acquired or both).
