Crossword puzzle clue "refraction device"

Here are the possible solutions for refraction device clue

Answer
Clue
Relevancy
prism
Clue
Refraction device
Definition
(Greek) a solid figure of which the two ends are similar, equal, and parallel rectilineal figures, and the sides parallelograms
halo
Clue
Meteorological effect caused by refraction
Refraction phenomenon
Definition
to form a ring of light
lens
Clue
Refraction producer
Definition
a piece of transparent matter with one or both surfaces curved to cause regular convergence or divergence of rays passing through it
mirage
Clue
Refraction consequence, perhaps
Definition
a type of optical illusion
optometry
Clue
Profession concerned with refraction
Definition
the science of vision and eye-care
abacus
Clue
Calculating device
Counting device
Definition
(Latin) a counting frame using beads

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