{"id":141,"date":"2013-07-15T10:57:49","date_gmt":"2013-07-15T09:57:49","guid":{"rendered":"http:\/\/www.vision-laser.fr\/?page_id=141"},"modified":"2020-12-08T11:38:51","modified_gmt":"2020-12-08T10:38:51","slug":"vision-des-couleurs-et-daltonisme","status":"publish","type":"page","link":"http:\/\/www.vision-laser.fr\/en\/20-maladies-frequentes\/vision-des-couleurs-et-daltonisme\/","title":{"rendered":"Color Vision and Color Blindness"},"content":{"rendered":"

The eye may have color vision disorders called \"<\/span>dyschromatopsia<\/strong>\". The most common form is color blindness<\/strong>.<\/span><\/h2>\n

It should be noted, however, that color blindness only corresponds to the hereditary aspect of color vision anomalies. The other aspect concerns acquired deficiencies in color perception.<\/p>\n

 <\/p>\n

1- Normal color vision:<\/strong>
\nThe eye is capable, thanks to 3 types of specific retinal cells called cones, of perceiving the fundamental colors red, green and blue.
\nThese signals are then transmitted by the optical pathways to the brain in the form of messages coded by antagonistic red-green and blue-yellow pairs.
\nThe brain then develops the colored sensation at the level of the visual cortex and then other brain centers make us aware of the colored perception.<\/p>\n

 <\/p>\n

2- Hereditary dyschromatopsia: color blindness<\/strong><\/p>\n

 <\/p>\n

The different forms of color blindness:<\/em><\/strong>
\nThe color blind person does not have the 3 normal channels to form colors.
\n\u2013 either one of the channels is absent, then the color blind person is \"dichromate\", he only forms colors using 2 channels.<\/p>\n