T ests for colour vision deficiency

Ask for a colour vision test at an opticians if you think you or your child may have a colour vision deficiency particularly if it started suddenly or is getting worse.

Colour vision tests don't usually form part of the routine NHS eye test , but you can specifically ask for them.

Two of the main tests used to diagnose colour vision deficiency are:

  • the Ishihara test where you're asked to identify numbers contained within images made up of different coloured dots
  • colour arrangement where you're asked toarrange coloured objects in order of their different shades

There are a number of online tests usingsimilar techniques that may help detect a possible problem, but it's best to have a proper test at an opticians if you have any concerns about your colour vision.

Content supplied by the NHS Website

Medically Reviewed by a doctor on 21 Dec 2018