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Graphical representation of visual acuity data
Author(s) -
Moseley Merrick J.
Publication year - 1997
Publication title -
ophthalmic and physiological optics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.147
H-Index - 66
eISSN - 1475-1313
pISSN - 0275-5408
DOI - 10.1111/j.1475-1313.1997.tb00077.x
Subject(s) - depiction , representation (politics) , graphical display , visual acuity , line (geometry) , relation (database) , artificial intelligence , mathematics , computer science , computer vision , statistics , pattern recognition (psychology) , geometry , computer graphics (images) , optics , data mining , physics , philosophy , politics , political science , law , linguistics
Summary Accurate graphical depiction of data requires that distances between points map precisely to the quantitative differences they represent. In the case of Snellen visual acuity, consecutive line sizes do not generally correspond to equal increments in visual angle, hence scores plotted against axes marked off in equal intervals provide a false representation of the relation between plotted values. A worked example illustrates the nature of this problem and its solution.