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}
}
  • B. Cole, Ka-Yee Lian, C. Lakkis
  • Published 2006
  • Psychology, Medicine
  • Clinical and Experimental Optometry
  • 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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