title: Technical note: apparatus for comparison of progressive addition spectacle lenses.
abstract: Apparatus is described for the measurement of lens power distribution across the surface of a progressive addition spectacle lens. Although the method used is different to that specified in BS 2738-7:1996, the measurements are nevertheless comparable, and are considered sufficiently accurate for making basic comparisons of lens type.
authors.affiliation: School of Life and Health Sciences, Aston University, Birmingham B4 7ET, UK. c.w.fowler@aston.ac.uk
authors.forename: C W
authors.initials: CW
authors.lastname: Fowler
mesh_terms: D001251:Astigmatism / Q000534:rehabilitation; D004867:Equipment Design; D005139:Eyeglasses; D006801:Humans; D009907:Optometry / Q000295:instrumentation* / Q000379:methods; D015203:Reproducibility of Results