نتایج جستجو برای: protan
تعداد نتایج: 96 فیلتر نتایج به سال:
Females heterozygous for congenital colour vision defects are of interest because they are believed to have cone photoreceptor ratios and cone photopigments that differ from normal. We describe a molecular genetic method to identify protan carriers that involves characterizing the genes that occur in the most upstream position in each of the X-chromosome photopigment gene arrays.
The color vision of 18 women whose color vision genotype was known were tested on the Nagel anomaloscope. An amended examination procedure was used which allowed repeated brightness matches to be made. This procedure revealed that the spectral region of minimum average brightness settings was useful in determining heterozygosity for protan defects and that deutan heterozygous persons have a uni...
In this paper, the effect of protan CVD algorithm is analyzed. Using algorithm, theimages are recolored, so that they suitable for use by people. first part, a trichromaticanomaly protanomaly type described. After that, The second part ofthe paper describes Experiment in which effectiveness was tested. algorithmwas applied to images from Ishihara color blindness test database, were purposely fo...
PURPOSE Leber's hereditary optic neuropathy (LHON) is a maternally inherited disease resulting in loss of central vision and dyschromatopsia, caused by mitochondrial DNA point mutations. However, only a subset of the mutation carriers becomes affected, with a higher penetrance in males. This study was conducted to investigate chromatic losses in asymptomatic carriers of the LHON mutation. MET...
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