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line of vision

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noun Ophthalmology.
  1. a straight line that connects the fovea centralis of an eye with the point on which the eye focuses.
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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for line of vision

line of vision

noun
  1. ophthalmol a straight line extending from the fovea centralis of the eye to an object on which the eye is focusedAlso called: line of sight
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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