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KB Term:
Sigma KEE - SnellenChart
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SnellenChart
A chart of letters, that appear random, used for measuring visual acuity.
Relationships
Parents
MeasuringDevice
Any
Device
whose purpose is to measure a
PhysicalQuantity
.
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Suggested Upper Merged Ontology (SUMO) web home
Sigma version 3.0 is
open source software
produced by
Articulate Software
and its partners
