Search for coloured objects in natural surroundings by people with abnormal colour vision

Clinical & Experimental Optometry : Journal of the Australian Optometrical Association
Barry L Cole, Ka-Yee Lian

Abstract

People with abnormal colour vision often report difficulty seeing coloured berries and flowers in foliage, which suggests they will have a diminished capacity for visual search when target objects are marked out by colour. There is very little experimental evidence of the effect of abnormal colour vision on visual search and none relating to search for objects in natural foliage. We showed 79 subjects with abnormal colour vision (seven protanopes, 10 deuteranopes, 16 protanomals and 46 deuteranomals) and 20 subjects with normal colour vision photographs of natural scenes and asked them to locate clumps of red berries, to trace the length of a red string on grass and to name the season depicted in a photograph taken in the Autumn and the same scene photographed in the Summer. Colour vision was assessed using the Ishihara, the Medmont C100, the Farnsworth D15, the Richmond HRR and the Nagel anomaloscope. All the subjects with abnormal colour vision located fewer clumps of red berries than those with normal colour vision. The subjects who failed the Farnsworth D15 performed significantly worse than those who passed but the distribution of scores in the two groups overlaps. The majority of subjects with abnormal colour vision could...Continue Reading

References

May 1, 1989·Optometry and Vision Science : Official Publication of the American Academy of Optometry·J M Steward, B L Cole
Jan 1, 1988·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·B L Cole, W A Macdonald
Apr 15, 2003·Human Factors·Kylie A O'BrienAndrew B Forbes
Aug 18, 2004·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Barry L ColeKen Sharpe
Aug 18, 2004·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·John L CampbellFraz A Mir
Aug 18, 2004·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·J Anthony B Spalding
Aug 18, 2004·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·David M Cockburn

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Citations

Dec 17, 2008·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Jennifer Birch, Catharine M Chisholm
Jun 12, 2009·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Barry L Cole, Ross W Harris
Apr 12, 2007·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Barry L Cole
Oct 26, 2007·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Ross W Harris, Barry L Cole
Jul 22, 2014·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Nishanthan RamachandranNick Wilson
Dec 1, 2009·Neuropsychologia·Sebastian W von ArxThomas Nyffeler
Oct 4, 2008·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Chris A Johnson
Feb 26, 2008·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Yancy C York, Michael S Loop
Aug 31, 2019·Acta Ophthalmologica·Oliver Andreas PfäffliChristina Gerth-Kahlert
Feb 15, 2012·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Kinjiro AmanoJohn P Oakley
Oct 24, 2019··David R. FlatlaWanda Li

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