An early step in the development of the achromatic lens, since it corrects some chromatic aberration.
From the en.wikipedia.org
Brewster chose renowned achromatic lens developer Philip Carpenter as the sole manufacturer of the kaleidoscope in 1817.
From the en.wikipedia.org
The invention of the achromatic lens in 1733 partially corrected color aberrations present in the simple lens and enabled the construction of shorter, more functional refracting telescopes.
From the en.wikipedia.org
It can be further minimized by using an achromatic lens or achromat, in which materials with differing dispersion are assembled together to form a compound lens.