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The Velhagen colour vision test in book form. 36 colour vision test charts.

The Velhagen test is a specialist colour vision test used mainly in Germany. These are sets of pseudoisochromatic charts, each of which contains an image consisting of randomly arranged coloured dots. Inside these images are figures or numbers that should be visible to people with normal colour vision, while people with red-green colour vision deficiency may see different figures or nothing at all. The Velhagen charts are used to quickly diagnose colour blindness and determine its type and severity.

The Velhagen colour chart book by Thieme

The Velhagen colour chart book contains colour charts that allow testing for any red-green visual impairment. On these vision test charts, numbers and letters in contrasting colours are placed on a patterned background. The colour values ​​of the numbers and characters differ from the background values, but the colour brightness values ​​remain the same. This means that coloured images can be recognised solely on the basis of their colours and colour perception can be tested.

Product Details
Colour vision test charts
Velhagen colour vision test charts
In book form with practical Wire-O binding
Suitable for patients of different ages and ethnic origins
36 illustrations
Includes contrast sample and demo cards
ISBN: 9783132447561
Scope of delivery
1 Thieme Velhagen colour chart book
1 contrast sample, demo cards