title: The chi 2 test for data collected on eyes.
authors.affiliation: Department of Ophthalmology, University of Leicester, Leicester Royal Infirmary.
authors.forename: J R
authors.initials: JR
authors.lastname: Thompson
mesh_terms: D016009:Chi-Square Distribution; D005006:Ethnicity; D006801:Humans; D009885:Ophthalmology / Q000706:statistics & numerical data*; D014792:Visual Acuity