Medical Questions » Eyes Questions » Question No. 335
| Question: | What is colour blindness? |
| Answer: | The normal form of colour blindness is an inability to differentiate between the colours red and green. In some men, other colours may be involved, but only rarely is all colour vision lost with the person seeing in black and white. Colour blindness is hereditary, and occurs nearly always in men.
Special cards covered in coloured dots, with numbers hidden amongst the dots, are used by doctors to diagnose the condition.
There is no treatment available, but most patients can live quite happily with the problem, and may have adapted so completely to the problem, that they are not aware of its existence. Those planning a to work as an electrician or commercial pilot, or in some other areas where colour differentiation is vital, may not be allowed to undertake these careers.
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