Methods: To investigate the ophthalmologists? views, a 12-item questionnaire was applied to 140 ophthalmologists who have professional experiences in colour-vision tests in daily practice. To measure response time duration of per plate and total test duration, a brand-new Ishihara 38-plate version has been scanned and applied on 250 individuals through a PC.

Results: Almost all the participants (98.57%) were using Ishihara pseudoisochromatic-plates in their daily routine clinical practice even though 85% of them believe that the Ishihara test does not meet their needs at least partially. They also believe that the plates deform in time and lose their accuracy. The standard deviations of the total test duration of per plate are quite high which means the total test duration for the Ishihara test cannot be standardized.

Conclusions: It is a matter of debate to use the Ishihara test with so many drawbacks which some of them may affect test results directly. Ishihara instruction about time is one of the contentious issues to decide if it should be followed during the test. For more defi nite results, the study should be applied on more individuals and the results should be compared with Anomaloscope. Keywords : Biomedical, Colour-blindness, Ishihara