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New American Oxford Dictionary

varifocal

varifocal |ˌvɛːrɪˈfəʊk (ə )l | ▶adjective denoting a lens that allows an infinite number of focusing distances for near, intermediate, and far vision. ▶noun (varifocals ) varifocal glasses.

 

Oxford Dictionary

varifocal

varifocal |ˌvɛːrɪˈfəʊk (ə )l | ▶adjective denoting a lens that allows an infinite number of focusing distances for near, intermediate, and far vision. ▶noun (varifocals ) varifocal glasses.