The TNO stereotest (19th edition) contains six test plates, presented in book form. The test has been primarly designed to detect amblyopia in young children (between 2,5 and 5 years old) but it can also be used for stereopsis testing for adults (depth perception) in occupational test settings.
The test will be delivered with a pair of red-green glasses (please choose between adult or children), the booklet includes instructions in English and Dutch.
The TNO stereo test is available since 1979 and since it’s release it is a very reliable and simple method which is used by ophthalmologists, orthoptists, optometrists and doctors all over the world.
The test contains the following 6 test plates:
Plates 1 to 3: screening plates
Plate 4: plate for testing eye suppression
5 and 6: plates for the quantitative testing of stereoacuity
On the 3 screening plates images are shown (such as a butterfly and geometric forms) that, when viewed with the red-green glasses, seem to float above the plate. The quantitative plates have optoptypes in the form of discs with parts missing.
The TNO stereotest will be delivered with a solid red / green glasses designed specifically for this test. You can choose between glasses for adults or children.
It is also possible to order the glasses seperately without the book, click on the following link: red-green glasses
Instruction of use TNO stereotest
The recommended viewing distance of this test is 40 cm, during the test the red-green glasses should be removed. The use of another pair of red-green glasses can have consequences for the diagnosis so please always use the official glasses which are provided with the test.
The colors of the test are selected for testing under daylight, this means a level 500 to 1000 lux. However, any other light source with a similar color rendering index may be used as well.
Improvements compared to the 18th edition
The color scheme of Plate IV, the Suppression test, has been improved.
Plate VII has been taken out of the test. This plate was not observed by the children aged 2 to 4 years and caused frustration and lack of cooperation in this age group.
The plates have received a different, improved color scheme.
The design of the test has been adapted to current standards. You can also immediately recognize the new edition.
This is the laminated version of the Hardy Rand Rittler Test (4th edition). HRR colour test with 20 plates. This book includes 4 demonstration plates, 6 plates for Screening, 14 plates to diagnose color deficiency.
The HRR is available from stock and will be shipped within 24 hours.
Ishihara colour deficiency test with 38 plates. This is the most complete Ishihara test and it tests for protan & deutan defects. Patients must identify numbers or patterns formed in a matrix of small coloured dots varying in colour & intensity (pseudo-isochromatic plates). Ideal for commercial/ industrial colour screening.
We have this Ishihara test available from stock, worldwide delivery.