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20 answers for: Unit for measuring the refractive power of a lens
RANKANSWERCLUE
DIOPTREUnit for measuring the refractive power of a lens
OPTOMETERFormerly, an instrument for measuring the refractive power of the eye, used when prescribing corrective lenses (9)
DIOPTERUnit of refractive power of a lens
DIOPTRESUnits of measurement of the power of a lens (8)
MEGAFLOPA unit for measuring the speed of a computer system; or an informal term for a great failure (8)
BRAKEHORSEPOWERUnit for measuring the rate of work of a motor (5,10)
LUMENUnit for measuring the brightness of a light
TOGUnit for measuring the warmth of a duvet
VOLTUnit for measuring the power of an electric current
DECIBELUnit for measuring the intensity of a sound; symbol dB (7)
GIFNEWTONUnit for measuring the force of some PC picture files?
BELUnit for measuring the intensity of sound
CARATUnit for measuring the weight of diamonds (5)
PRINCIPALAXISLine through the centre of curvature of a lens (9,4)
GOOGOLPLEXTen to the power of ten to the power of a hundred
ACHROMATISMThe ability of a lens to focus all wavelengths to the same point (11)
ASTIGMATISMDefect of a lens in the eye causing visual distortion
WIDEANGLEOf a lens, having a broad field (4 5)
LASIKOption for treating a refractive error
SPECTROMETERInstrument for measuring refractive indices (12)