Railway signal lights also rely heavily on red-green-yellow colors. In both cases, these color combinations can be difficult for the red-green colorblind. Lantern Tests are a common means of simulating these light sources to determine not necessarily whether someone is colorblind, but whether they can functionally distinguish these specific signal colors. Those who cannot pass this test are generally completely restricted from working on aircraft, ships or rail. Fashion
Color analysis is the analysis of color in its use in fashion, to determine personal color combinations that are most aesthetic. Colors to combine can include clothing, accessories, makeup, hair color, skin color, eye color, etc. Color analysis involves many aesthetic and comparative color task that can be difficult for the color blind. Most colorblind individuals conservatively avoid brightly colored clothes to avoid combining colors that may be viewed as unaesthetic by people with normal color vision. Advantages
People with deuteranomaly are better at distinguishing shades of khaki, which may be advantageous when looking for predators, food, or camouflaged objects hidden among foliage. Dichromats tend to learn to use texture and shape clues and so may be able to penetrate camouflage that has been designed to deceive individuals with normal color vision.In the presence of chromatic noise, the colorblind are more capable of seeing a luminous signal, as long as the chromatic noise appears metameric to them. This is the effect behind most "reverse" Pseudoisochromatic plates (e.g. "hidden digit" Ishihara plates) that are discernible to the colorblind, but unreadable to color normals.
The first line of pharmacotherapy is usually SSRIs due to their purported more tolerable nature and reduced side effects compared to the irreversible monoamine oxidase inhibitors or tricyclic antidepressants. Studies have found that the mean response to antidepressant medications for people with dysthymia is 55%, compared with a 31% response rate to a placebo. The most commonly prescribed antidepressants/SSRIs for dysthymia are escitalopram, citalopram, sertraline, fluoxetine, paroxetine, and fluvoxamine. It often takes an average of 6–8 weeks before the patient begins to feel these medications therapeutic effects. Additionally, STAR*D, a multi-clinic governmental study, found that people with overall depression will generally need to try different brands of medication before finding one that works specifically for them. Research shows that 1 in 4 of those who switch medications get better results regardless of whether the second medication is an SSRI or some other type of antidepressant.In a meta-analytic study from 2005, it was found that SSRIs and TCAs are equally effective in treating dysthymia. They also found that MAOIs have a slight advantage over the use of other medication in treating this disorder. However, the author of this study cautions that MAOIs should not necessarily be the first line of defense in the treatment of dysthymia, as they are often less tolerable than their counterparts, such as SSRIs.Tentative evidence supports the use of amisulpride to treat dysthymia but with increased side effects. Combination treatment
When pharmacotherapy alone is compared with combined treatment with pharmacotherapy plus psychotherapy, there is a strong trend in favour of combined treatment.