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wavefront

British  
/ ˈweɪvˌfrʌnt /

noun

  1. physics a surface associated with a propagating wave and passing through all points in the wave that have the same phase. It is usually perpendicular to the direction of propagation

"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

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Wavefront Lasik uses 200 little lenses to map the cornea, taking into account all its bumps and abnormalities to produce a highly accurate, individualized prescription.

From Time Magazine Archive