virtual focus

noun

Medical Definition of virtual focus

: a point from which divergent rays (as of light) seem to emanate but do not actually do so (as in the image of a point source seen in a plane mirror)

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“Virtual focus.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/virtual%20focus. Accessed 10 Aug. 2020.

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