achromats

/ˈeɪkroʊˌmæts/
noun
  1. People who cannot see colors; color-blind individuals.
    • Special glasses can help achromats perceive some colors.
    • Achromats often rely on brightness and contrast to distinguish objects.
    • The test helped identify achromats among the students.
  2. Lenses that correct chromatic aberration, bringing all colors to the same focus.
    • The telescope uses achromats to produce clear images.
    • He replaced the old lens with a pair of achromats.
    • Modern microscopes often include achromats for better resolution.
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