Assertion: lens | /r/CapableOf | bring the focus of all colours
Facets:
value: to the same convergence point
type: TRANSITIVE-OBJECT
Source sentences:
text: Description: A lens which is specially designed to control the effects of chromatic distortion or aberration (a defect of optical lenses to bring the focus of all colours to the same convergence point) is called an achromatic lens.