title: The association between spherical and cylindrical component powers.
authors.affiliation: Department of Optometry and Vision Sciences, Cardiff University, Wales, United Kingdom.
authors.forename: Jeremy A
authors.initials: JA
authors.lastname: Guggenheim
authors.forename: Jane E
authors.initials: JE
authors.lastname: Farbrother
mesh_terms: D005139:Eyeglasses; D006801:Humans; D006956:Hyperopia / Q000175:diagnosis*; D009216:Myopia / Q000175:diagnosis*; D012029:Refraction, Ocular