title: Authors' Response.
authors.affiliation: Birmingham, United Kingdom Glasgow, United Kingdom.
authors.forename: Janis B
authors.initials: JB
authors.lastname: Orr
authors.forename: Dirk
authors.initials: D
authors.lastname: Seidel
authors.forename: Mhairi
authors.initials: M
authors.lastname: Day
authors.forename: Lyle S
authors.initials: LS
authors.lastname: Gray
mesh_terms: D005260:Female; D006801:Humans; D006956:Hyperopia / Q000503:physiopathology*; D008297:Male; D009216:Myopia / Q000503:physiopathology*; D011680:Pupil / Q000502:physiology*