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Ask the Optician

Ishihara test

On 3 March 2011 by Paul Carroll

Question What is the Ishihara test?

Answer Written answer:
Registered Optometrist Paul Carroll BSc(Hons) MCOptom MBA answers this question.
This is a test which the optician uses, largely on children, to identify colour blindness. The optician will show you a number of plates which are printed with dots of different colours, brightness, density and sizes, arranged so that the dots of similar colour form a figure (for example a number) among a background of dots in another colour.

Optician's Biography

Optometrist Paul Carroll joined Specsavers 20 years ago as the resident optometrist director at Specsavers in Southport and for the last 15 years, has worked as Director of Professional Services for the Specsavers group. Paul is closely involved with the development of eyecare services at Specsavers and across the wider optical sector through his appointment to a variety of professional, health and educational posts.

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