Many ready-made reading spectacles fail the required standards

Optometry and Vision Science : Official Publication of the American Academy of Optometry
David B Elliott, Alison Green

Abstract

To determine whether the optical quality of near-vision ready-made spectacles (RMS) reaches the quality assurance levels required by the international standard ISO 16034:2002. A total of 322 near-vision RMS of powers +2.50, +3.00, and +3.50 DS were randomly selected from high street stores in North East England. Assessments of the optical quality of the RMS were made, and the results were compared against the standards included in ISO 16034:2002 and the more lenient standards used to assess RMS in low-resource countries. Forty-eight percent of the 322 near-vision RMS failed to provide the optical quality required by international standards, with 62% of the +3.50 DS spectacles failing the requirements. This was principally due to a high prevalence of induced horizontal (60%) and vertical prism (32%) beyond the tolerance levels stipulated in ISO 16034:2002. The figures were similar when the more lenient standards used to assess RMS in low-resource countries were used due to RMS centration distances that were too large. There is a large prevalence of significant amounts of induced horizontal and vertical prism in higher powered near-vision RMS such as +3.50 DS. Given that the need for high-powered RMS indicates the presence of hyp...Continue Reading

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Citations

May 17, 2012·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Jonathan S Pointer
Dec 30, 2014·TheScientificWorldJournal·Eduardo ArenasDiana Morales
Apr 1, 2015·Contact Lens & Anterior Eye : the Journal of the British Contact Lens Association·Anna SulleyGiovanna Olivares
Feb 18, 2017·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·Hema Radhakrishnan, W Neil Charman
Aug 19, 2016·Optometry and Vision Science : Official Publication of the American Academy of Optometry·Alison J AldersonDavid B Elliott

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