The Ishihara Colour Deficiency Test is ideal for commercial/ industrial colour screening for protan and dutan defects.

Patients must identify numbers or patterns formed in a matrix of small coloured dots varying in colour and intensity (pseudo-ischromatic plates).

Three editions are available:
38 plate for detailed investigation - ACEY006A
24 plate for quick screening - ACEY006
14 plate concise edition - ACEY006B