Assertion: lens | /r/MadeOf | material
Facets:
value: with a particular refractive index
type: OTHER
Source sentences:
text: A lens clock measures the curvature of a surface, but gives the result as an optical power in diopters, assuming the lens is made of a material with a particular refractive index.
text: Lenses with different replacement schedules can be made of the same material.
text: If the lens is made of some other material, the reading must be adjusted to correct for the difference in refractive index.