Colour blindness test

Numéro d’image : 11849569
Colour blindness test
Colour blindness test. Cards that are used to check for red-green colour blindness. The Ishihara test,which uses pseudoisochromatic plates,is the most widely used. These cards depict a pattern of red and green dots. People with normal vision or total colour blindness should not be able to distinguish any number. People with red-green deficiencies should read a number on each card. Colour blindness is usually caused by an inherited genetic defect in the light-sensitive pigments of the eye,but it can be caused by optic injury or nerve diseases. Up to 8% of the male population is affected,and ten times more men have colour blindness than women
Licence : Droits gérés
Crédit: Science Photo Library / ANNABELLA BLUESKY
Taille de l’image : 5041 px × 3404 px
Model Release : Non requis
Property Release : Non requis
Restrictions : -

Prix pour cette image À partir de 45 €

Produit vendu
(Calendrier, Carte postale, Carte de vœux, Impression sur textile, Packaging etc)
À partir de 45 €
Usage commercial
(Affichage, Annonce presse, Annonce TV, Carte, Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 45 €
Éditorial
(Digital, Journal, Livre, Livre pratique, Magazine, Télévision etc)
À partir de 60 €
Usage non-commercial
(Digital - hors rés. sociaux, Digital - rés. sociaux etc)
À partir de 120 €

Mots clés

;