Site display: Normal | Text Only

My Collection | About Us | Teachers

Find objects

Select from more than one or two options below:

Objects search

Can't find what you're looking for? Try the search below.

Ishihara colour blindness test, London, England, 1948

Used to test for colour blindness, this test is named after its inventor, Shinobu Ishihara (1897–1963), a Japanese ophthalmologist. Each image is made up of a series of closely packed coloured dots and includes a number. The patient is asked to identify the number or image that they can see. By using the range of charts, the type of colour blindness a patient has can be identified. There are three types of colour blindness: daltonism – inability to distinguish reds from greens (the most common type); monochromatism –where all colours appear as shades of one colour; and total colour-blindness. Ishihara devised his test in 1917 and is still used today.

Object number:

A662609

Related Themes and Topics

Related Objects

There are 461 related objects. View all related objects

 

Glossary:

Glossary: ophthalmology

The branch of medicine dealing with the diseases and surgery of the visual pathways (usually the eyes or the brain).

Glossary: book

A written or printed work consisting of pages glued or sewn together along one side and bound in covers. Usually continuous printing or writing.

Glossary: colour blindness test

A test to find whether a person is colour blind. The most commonly used test in the world is the Ishihara test invented in 1917, where numbers are concealed within a circle of different colours.