Currently, the responsibility for determining if a person's colour vision deficiency will have a detrimental effect on their ability to perform their duties is the responsibility of the Level 3 and employer. The ability to use colour to present data is increasing with the use of digital imaging in radiography and ultrasonic testing, especially with such applications as phased array testing. Colour vision deficiency can be inherited and one of the more common defects is the red-green deficiency, present in about 8% of males and only 0.5% of females of Northern European ancestry. There are a range of inherited diseases and colour blindness can be present at birth or commence in childhood or adulthood.
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