COLOUR TESTS Click on image to view full size

COLOUR TESTS

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Detailed Description

Colour Tests

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ISHIHARA 24 and 38 PLATE
This confusion test remains the most popular and efficient of the simpler tests for speedy detection of red/green colour vision deficiency. The Ishihara test assist in differentiating between congenital and acquired and certain type III acquired defects. Available in 24 and 38 plate editions and includes instructions.

Product Ref:
ISHI24 - 24 Plates   Read Instructions.
ISHI38 - 38 Plates   Read Instructions.

N.B. It is very important NOT to leave the plates exposed to strong light as the dyes can fade. Use under ordinary fluorescent or incandescent light. Keep pages closed when not used.

Farnsworth D15 Dichotomous Test

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(Product Ref: RIFD15C)
(Also available in a magnetic set)

Farnsworth Dichotomous testing sets are designed to indicate color deficiency quickly and easily. The Farnsworth D15 test is used to separate Medium and Strong color defect vs. Normal. Sixteen hues spaced at nearly equal intervals; studies the characteristic axes of true dyschromatopia. Ideal for rapid diagnosis of the type of dyschromatopia and for separating the dichromats from the anomalous trichromats.

Complete with score pad and protective acrylic case. Because the case is clear it is very easy to invert and read numbers through bottom of case.

N.B. - FANSWORTH D15 AND L'ANTHONY TESTS: It is very important NOT to leave the plates exposed in strong light as the dyes can fade. Use under ordinary fluorescent or incandescent light. Keep in dark place, bag or tube when not used. Do not allow fingers to touch colours.

L'ANTHONY'S DESATURATED 15 HUE TEST

(Product Ref: RILD15C)
(Also available in a magnetic set)

The Lanthony Desaturated test is much more difficult and is used to separate mild deficiency from Normal. The purpose of this test is to reveal colour deficiencies and to differentiate amongst the subjects affected by dyschromatopia. Because of its sensitivity it is particularly useful for the diagnosis of abnormal congenital trichromats and lesser acquired dyschromatopia. Similar to the Farnsworth D15 test but with lower saturation.

Complete with score pad and protective acrylic case. Because the case is clear it is very easy to invert and read numbers through bottom of case.

 
Interesting websites

http://www.colorvisiontesting.com
http://www.richmondproducts.com/FD15FarnsworthChipTest.htm

Hamilton-Veale Telco 10 Wire Colour Test

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Product reference: EYOTELCO

This test is designed to illustrate the problems a person with a colour deficiency has to a third party, i.e. parents, partner, teacher etc.
Problems with selecting clothes colours, having sock colours match, ties and scarfs to match dress, fruit ripeness, safety issues etc
There are 50x coloured telephone wire sticks i.e. 10 stick of 5 colours.

Patient asked to put the 50 sticks into 5 piles of each colour.  The difficulty to match the colours is an easy illustration for others to understand.

Click here to view the instructions