An anomaloscope designed to detect red-green color blindnesses is based on the Rayleigh match, which compares a mixture of red and green light in variable proportions to a fixed spectral yellow of variable luminosity. The subject must change the two variables until the colors appear to match. The values of the variables at match (and the deviation from the variables of a color normal subject) are used to diagnose the type and severity of colorblindness. For example, deutans will put too much green in the mixture and protans will put too much red in the mixture. Genetic testing
Most tests evaluate the phenotype of the subject, i.e. the functionality of their color vision, but the genotype can also be directly evaluated. This is especially useful for progressive forms that do not have a strongly deviant phenotype at a young age. However, it can also be used to sequence the L and M opsins on the X Chromosome. The most common anomalous alleles of these two genes are known and have even been related to exact spectral sensitivities and peak wavelengths. A subjects anomalous alleles can therefore be classified through genetic testing. Management
Despite much recent improvement in Gene therapy for color blindness, there is currently no FDA approved treatment for any form of CVD, and otherwise no cure for CVD currently exists. Management of the condition by using lenses to alleviate symptoms or smartphone apps to aid with daily tasks is possible.
Relapsing linear acantholytic dermatosis is a cutaneous condition characterized by relapsing linear erosions and crusting, histologically identical to Hailey–Hailey disease. : 849  It is not to be confused with transient acantholytic dermatosis. See also
Linear porokeratosis
List of cutaneous conditions


== References ==