Colour blind test is important since it enables people to determine whether they have a colour vision deficiency or not. In Australia, most tests are used in job recruitments for various jobs such as a pilot and during enrolment of police officers. Colour blindness is an eye condition in which the human eyes are unable to differentiate certain colours. The most common type is the red-green colour blindness while the blue type is rare.

There are various colour blindness tests conducted in Australia and they include the following: The Ishihara plates colour blindness test. This method consists of plates that are of various coloured circles and they show a number which can only be identifies by people who are not colour blind. It mainly shows whether you have the red-green colour blindness but it does not show its severity.

The plates make up various test designs such as; the transformation plates in which colour blind persons see a different figure from those with normal vision. Vanishing plates, the figure in this test can only be identified by people with a normal colour vision. The hidden digit plates consist of a figure that can only be seen by people who have a colour vision problem. Lastly there is the diagnostic plate which determines the type and the severity of the colour blindness an individual has.

The other type of colour blind test is the Farnsworth dichotomous test (D-15) which belongs to the colour arrangement tests category. In this category the tests are based on various colours, the D-15 test consists of fifteen colours which are made up of up to one hundred different hues. Normally it is arranged in a correct order and individuals are required to choose a tester which will determine the type of colour blindness they are suffering from. In order to determine whether you are colour blind or not, you are advised to visit an eye doctor for a conclusive eye examination.

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