Jun-Yun Zhang|Ting Zhang|Feng Xue|Lei Liu|Cong Yu
Legibility Variations of Chinese Characters and Implications for Visual Acuity Measurement in Chinese Reading Population
Beijing Normal University|Chinese Academy of Sciences|Shanghai Institute of Applied Physics|Beijing Normal University|Chinese Academy of Sciences|Shanghai Institute of Applied Physics|Obstetrics and Gynecology Hospital of Fudan University|University of Alabama at Birmingham|Beijing Normal University|Chinese Academy of Sciences|Shanghai Institute of Applied Physics
purpose written chinese contains enormous number characters wide range spatial complexities consequently legibility chinese characters expected vary significantly variability offers challenge deriving simple visual function measurement chinese reading population purpose study suggest solution challenge psychophysical studies chinese character legibility methods illustrate legibility variations chinese characters visual acuities six groups chinese characters low high spatial complexities one group sloan letters determined six normalsighted chinese observers relationship legibility optical defocus determined landolt c snellen e three groups chinese characters representing low medium high spatial complexities 26 normalsighted chinese readers results acuity size chinese characters increased steadily stimulus complexity though slower rate would expected visual acuity based finest details stimuli acuity size versus optical defocus functions three chinese character groups snellen e similar slopes differed vertical shift depending optotype spatial complexity function landolt c significantly steeper conclusions findings indicate visual acuity assessment chinese readers complicated spatial complexity chinese characters fact snellen e current national standard acuity measurement china chinese characters showed similar dependence optical defocus may indicate potentially valid way infer functional vision chinese readers snellen e acuity