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pseudoisochromatic
pseudoisochromatic adj.
Brit. 
/ˌs(j)uːdəʊʌɪsə(ʊ)krəˈmatɪk/
, /ˌs(j)uːdəʊʌɪsə(ʊ)krəˈmatɪk/U.S. /ˌsudoʊˌaɪsoʊkrəˈmædɪk/
Ophthalmology composed of different colours that appear the same to a colour-blind person; designating a test for colour blindness that makes use of plates composed of such colours./ˌsudoʊˌaɪsoʊkrəˈmædɪk/ΘΚΠ
the world > health and disease > healing > ophthalmology or optometry > [adjective] > kinds of eye-test
Snellen1864
Jaeger1869
pseudoisochromatic1879
1879 T. J. Dills tr. J. Stilling in Arch. Ophthalmol. 8 182 If we intermix the different shades of both inter~changeable colors in smaller or larger squares, in such manner that the squares of the one color form letters and figures, and those of the other the groundwork, so that the different intensities alternate in ground and letter..the question as to judgment of colors is rendered unnecessary, the inquiry being merely about letters, numbers, figures. This is the principle of the pseudo-isochromatic plates.
1949 H. C. Weston Sight, Light & Efficiency vii. 241 For distinguishing between the varieties of colour-sense deficiency,..what are called pseudo-isochromatic plates are available.
1993 Ophthalmic & Physiol. Optics 13 35 The accuracy of three new pseudoisochromatic tests for detecting red-green colour deficiency was assessed.
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