protanopia


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Related to protanopia: Protanomaly, deuteranopia

protanopia

[‚prōd·ə′nō·pē·ə]
(medicine)
Partial color blindness in which there is defective red vision; green sightedness. Also known as protanomaly.
References in periodicals archive ?
Na Figura 2 sao apresentadas as imagens obtidas atraves do simulador, mostrando como as embalagens sao vistas por individuos portadores de (1) protanopia, (2) deuteranopia e (3) tritanopia.
Para a amostra de cor 1 (matiz vermelho), na simulacao da protanopia, ocorreram alteracoes em todas as variaveis da cor (quantidades de vermelho, verde e azul que compoem amostra, e niveis de matiz, saturacao e claridade).
Ao ser observada sob a perspectiva de um portador de protanopia, percebe-se reducao no nivel de vermelho em conjunto com aumento nos niveis de verde e azul, bem como variacao no angulo do matiz, e reducao nos niveis de saturacao e brilho.
Table 1 shows the equivalent measurements obtained through the Variantor goggles (distributed by Cambridge Research Systems, http://wwwvariantor.co.uk/) or after each transformation performed by Coblis to simulate protanopia or deuteranopia.
The Pseudoackromatic Stimuli Identification task (task 1) included 20 trials (10 for each stimulus set; 5 for the green semiset and 5 for the red one), for each colour transformation (Variantor, Coblis protanopia, Coblis deuteranopia).
For example, the leftmost bar in Figure 5a indicates that the [h.sub.uv] difference ([DELTA][h.sub.uv]) for the combination of Variantor, MC and pseudoachromatic green was only 3.84[degrees] The lack of asterisks indicates that such small difference was not significant (p>0.05), like most comparisons between Variantor empirical results and the predictions for protanopia (leftmost bars in Figures 5a and 5b, only one of eight comparisons was significant, p<0.01).
Red and green CVD (protanopia and deuteranopia, respectively) have the highest frequency in the general populations (Oriowo and Alotaibi, 2008).
In Pakistan, there is very little data available reporting the distribution of protanopia and deuteranopia in the general population.
Data were statistically analyzed on SPSS-16 to find out frequencies of protanopia and deuteranopia among the studied population.
The term protan would encompass both protanopia and protanomaly and the term deutan, both deuteranopia and deuteranomaly.
Dichromacy is further divided into protanopia, deuteranopia and tritanopia.
The main cause of protanopia and deuteranopia lies in the unequal intergenic and intragenic recombination of the L- and M-cone pigment genes.