Visual acuity: calculating appropriate averages.
Controversy surrounds the averaging of visual acuity scores. We examine this debate and provide a series of guidelines and worked examples to enable investigators to select an average (e.g. arithmetic mean, geometric mean, median) appropriate for their data.
Moseley
M J
MJ
Department of Ophthalmology, University of Birmingham, UK.
Jones
H S
HS
D006801:Humans; D012016:Reference Values; D013223:Statistics as Topic / Q000379:methods*; D014792:Visual Acuity