title: Letter to the Editor concerning "A systematic review of controlled trials on visual stress using intuitive overlays or colorimeter".
authors.affiliation: University of Bradford, Bradford, West Yorkshire, United Kingdom.
authors.forename: Philip G
authors.initials: PG
authors.lastname: Griffiths
authors.affiliation: University of Bradford, Bradford, West Yorkshire, United Kingdom.
authors.forename: Robert H
authors.initials: RH
authors.lastname: Taylor
authors.affiliation: University of Bradford, Bradford, West Yorkshire, United Kingdom.
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Henderson
authors.affiliation: University of Bradford, Bradford, West Yorkshire, United Kingdom. Electronic address: b.t.barrett@bradford.ac.uk.
authors.forename: Brendan T
authors.initials: BT
authors.lastname: Barrett