The new Richmond HRR pseudoisochromatic test for colour vision is better than the Ishihara test
@article{Cole2006TheNR, title={The new Richmond HRR pseudoisochromatic test for colour vision is better than the Ishihara test}, author={B. Cole and Ka-Yee Lian and C. Lakkis}, journal={Clinical and Experimental Optometry}, year={2006}, volume={89} }
Aim: The Hardy‐Rand‐Rittler (HRR) pseudoisochromatic test for colour vision is highly regarded but has long been out of print. Richmond Products produced a new edition in 2002 that has been re‐engineered to rectify shortcomings of the original test. This study is a validation trial of the new test using a larger sample and different criteria of evaluation from those of the previously reported validation study.
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