use, usage, utilization, application / exploitation, taking advantage of

lens (object focusing or defocusing the light passing through it)

refraction / inflection

to refract / to inflect (a word) / to be warped

use, utilize / exploit, take advantage of

a light, beam, illumination / a gleam, glow, ray / a glimmer, shine, sparkle / a luster/lustre, polish, sheen / glory, influence, power / a glimmer, gleam / positive aspect

zoom lens (lens whose focal length can be rapidly changed)

a Fresnel lens

Alternative spelling of フレネルレンズ (“Fresnel lens”)

(photography) a wide-angle lens