Dichromacy
A partial color blindness in which only two types of cones are active in the retina of the eye are called dichromasia or dichromatopsia . Therefore, patients with dichromatopsia cannot make certain color distinctions ( additive color synthesis ). A common misconception is that color blind people do not perceive certain colors; they just cannot make certain distinctions. Depending on which of the three cone types are impaired (L, M, K), a distinction is made between protanopsia / protanomaly ( red-green blindness / weakness of the first type), deuteranopia / deuteranomaly (red-green blindness / weakness of the second type) , and tritanopia / tritanomaly ( blue blindness / weakness).
Dichromasy cannot be treated. These types of color blindness are congenital ( inherited ).
literature
- Hans-Joachim Eichler: Optics: Wave and Particle Optics. Walter de Gruyter, Berlin 2004, ISBN 3-11-019804-5 .
- Martin Reim, Bernd Kirchhof, Sebastian Wolf: Diagnoses on the fundus of the eye: From findings to diagnosis. Thieme, Stuttgart 2003, ISBN 3-13-125641-9 .
- Wilhelm Wetsphal: Physical dictionary. Two parts in one band. Springer, Berlin / Heidelberg 1952. (2013 edition, ISBN 978-3-662-12706-3 , springer.com , p. 385)
Individual evidence
- ↑ Hans-Joachim Eichler: Optics: Wave and particle optics. Walter de Gruyter, Berlin 2004, ISBN 3-11-019804-5 , p. 732.
- ↑ Martin Reim, Bernd Kirchhof, Sebastian Wolf: Diagnoses on the fundus of the eye: From findings to diagnosis. Thieme, Stuttgart 2003, ISBN 3-13-125641-9 , p. 218.