Color DX


In stock

Pseudo-isochromatic colour vision test using numbers and shapes, suitable from 36+ months.

In stock


Color DX – Evaluation of Colour Deficiencies

This is a pseudo-isochromatic colour vision test that uses numbers and shapes (circle, star, cross and square) to make colour vision testing possible from as young as 36 months old.

The Color DX test replaces the CVTE with one comprehensive test for all ages. It comprises 24 testing plates in total, plus two demonstration pages. Clear instructions are printed in the book.

The 17- page Numbers Test screens for red/green colour deficiency in the first 14 plates. Plate 15 estimates the type (Protan, Deutan) and strength of the deficiency, and plates 16 and 17 screen for any blue deficiency (Tritan).

The shapes section comprises 7 testing pages, plus a demonstration plate. Six pages screen for red/green deficiency, and plate 7 screens for blue deficiency. Results are easily scored on a form to indicate a pass or fail

Ideal distance for conducting the test is 16″ to 24″ (40-60 cm) from the patient’s eyes. The test surface must be perpendicular to the line of sight.

Please click on the Score Sheet tab for a free download of the Color DX PIP 24 score sheet.




Additional information

Weight 0.373 kg

Score Sheet

Click HERE for the free download of the Color DX PIP 24 score sheet.


If the item shows as currently out of stock, please contact us via email or telephone +44 (0)1442 823507 to enquire this product’s availability.

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