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varifocals

British  
/ ˈvɛərɪˌfəʊkəlz /

plural noun

  1. a pair of spectacles with varifocal lenses

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

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Varifocals do a similar job but the transitions are much smoother.

From BBC

Autofocus lenses could help people who struggle with varifocals or bifocals, says Paramdeep Bilkhu, clinical adviser at the College of Optometrists.

From BBC

Wait until you're 52, look through the wrong bit of your varifocals and hey presto the bars are horizontal!

From Time

Even the correspondents were given a go, though I had left my varifocals in my road car.

From The Guardian