achromatism

Very occasionally a person lacks all color-receptors and is completely color-blind, a condition called achromatism (ay-kroh'muh-tiz-um; "no color" G).

The Human Brain Asimov, Isaac 1963

Although this peculiar disharmony in the dispersive powers of the two glasses, crown and flint, was discovered almost immediately after achromatism was invented, it was only recently that the first successful attempts were made to produce different glasses, which, possessing the other requirements for achromatic objectives, would produce coincident spectra, or nearer so than the ordinary crown and flint glass do.

Scientific American Supplement, No. 561, October 2, 1886 Various

This increase is due in part to the diffraction of the telescope, to imperfect achromatism or spherical aberration of the objective, to irregular grinding of the glass, and especially to variations in the refraction of the air, which produce an oscillation of the image around a mean position.

Lectures on Stellar Statistics Carl Vilhelm Ludvig Charlier 1898

As the diameter of the lens was so small in comparison with its focal length, its want of achromatism was inappreciable.

Experimental Determination of the Velocity of Light Made at the U.S. Naval Academy, Annapolis Albert A. Michelson 1891

[*] The power which the eye possesses of adaptation to near and distant objects, combining the uses of the microscope and the telescope, and the capacity of self-adjustment, preserving always a perfect achromatism and freedom from spherical aberration, have never been reached in nearly the same degree by art.

Religion and Chemistry 1880

True achromatism cannot be obtained with ordinary flint and crown-glass; and although in lenses of "Jena glass," outstanding colour is reduced to about one-sixth its usual amount, their term of service is fatally abridged by rapid deterioration.

A Popular History of Astronomy During the Nineteenth Century Fourth Edition 1874

And the mere fact that the problem of achromatism was solved by "the mind of a sagacious optician inquiring how this matter was managed in the eye," no more proves that

A Candid Examination of Theism George John Romanes 1871

A long list of indictments might indeed be brought against the eye -- its opacity, its want of symmetry, its lack of achromatism, its partial blindness.

Six Lectures on Light Delivered In The United States In 1872-1873 John Tyndall 1856

[331] The principle of achromatism was discovered (by

Form and Function A Contribution to the History of Animal Morphology

Thus examined, the departure of the eye from achromatism appears very gross indeed.] [Footnote 7: Both in foliage and in flowers there are striking differences of absorption.

Six Lectures on Light Delivered In The United States In 1872-1873 John Tyndall 1856