protanomalous การใช้

• From a practical standpoint though, many protanomalous and deuteranomalous people have very little difficulty carrying out tasks that require normal color vision.
• They work by notching out wavelengths that strongly stimulate both red and green cones in a deuter-or protanomalous person, improving the distinction between the two cones'signals.
• In order to match a given spectral yellow light, protanomalous observers need more red light in a red / green mixture than a normal observer, and deuteranomalous observers need more green.
• Finally, as yet more red is added, the remaining, protanomalous, observers will declare a match at a point where normal observers will see the mixed light as definitely reddish.
• See the article Color blindness : " Protans have difficulties distinguishing between . . . red and green colors . . . . Pure reds cannot be seen, instead appearing black . . . protanomalous individuals are less sensitive to red light than normal . . . . They also suffer from a darkening of the red end of the spectrum.