The NOC Colour Vision Assessment Unit

This unit can provide you with a detailed analysis of your colour vision if defective. There are four main varieties, each with its own effects on ability to distinguish colours. Overall, 8% of males have this problem, and just 0.5% of females.

People with defective colour vision vary considerably in the severity of the problem: anything between almost normal colour vision to total confusion of colours, though the latter is very rare. In most cases defective colour vision is an inherited defect. In such cases the defect is stable, will not change with age, and is untreatable. Where a defect is acquired as a result of eye disease or other condition the defect will often improve with medical treatment by an ophthalmologist.

The objectives of the Colour Vision Assessment Unit are:

  • to establish the type and severity of colour defect using a battery of tests including a sophisticated diagnostic instrument: the anomaloscope
  • using this information, to provide advice to people in different occupations and to school children and college students;
  • to provide advice on the use of a special “long pass”red filter to assist in distinguishing colours where appropriate;
  • to provide colour vision testing using a colour lantern where indicated for specific occupations;
  • to provide advice to employers on an appropriate standard of colour vision for employees whose work involves distinguishing colours;
  • to provide analysis of colour vision defects acquired as a result of eye disease or other conditions.

The Unit is headed by Dr Peter Davison PhD , who is a colour vision specialist, optometrist, and formerly a Senior Lecturer in Optometry at DIT.

Peter may be contacted as follows:

phone: +353 1402 4900

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