Here are the possible solutions for vision improving device clue
Answer
Clue
Relevancy
laser
Clue
Vision-improving device
Definition
a source of high-intensity optical, infrared, or ultraviolet radiation produced as a result of stimulated emission maintained within a solid, liquid, or gaseous medium
lens
Clue
Contact ___ (small vision-improving disk)
Definition
a piece of transparent matter with one or both surfaces curved to cause regular convergence or divergence of rays passing through it
ioniser
Clue
Device for improving air quality —noisier (anag)
Definition
something that ionizes, also IONIZER
scope
Clue
Aim-improving device
additionbysubtraction
Clue
Strategy for improving a business through downsizing ... and a literal description of the letters dropped from this puzzle's businesses
