Abstract
IT has long been a matter for surprise that the eye appears to be so perfectly achromatized. It was this which led Euler to conclude that the construction of achromatic lenses must be possible, and in consequence the optician Dollond sought for a method, and thus invented the use of negative flint lenses in association with positive crown glass ones. The celebrated cobalt-blue glass experiment and many others amply demonstrate the fact that the lens system of the eye is uncorrected for colour. It was this fact that presumably led to the remark, which is often ascribed to Helmholtz, that if a lens maker turned out so inferior a lens as that of the eye he would soon be out of business.
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References
Hartridge, H., Nature, 155, 391 (1945).
Hartridge, H., Nature, 155, 657 (1945).
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HARTBIDGE, H. The Anti-Chromatic Reflex. Nature 156, 666 (1945). https://doi.org/10.1038/156666a0
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DOI: https://doi.org/10.1038/156666a0