Calidad en manufactura de cristales

American National Standard

Z80.1-2005: Draft 9/4/04

ANSI Z80.1-2005 Revision of ANSI Z80.1-1999
American National Standard for Ophthalmics - Recommendations Prescription Ophthalmic Lenses Secretariat Optical Laboratories Association Approved American National Standards Institute, Inc.

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American National Standard

Z80.1-2005: Draft 9/4/04

Contents
1 2 3 4 5 6 7 8 9 Scopeand Purpose ...........................................................................................................................7 References ........................................................................................................................................8 Definitions..........................................................................................................................................9 Classification ...................................................................................................................................17 Optical Requirements ......................................................................................................................17 Mechanical Requirements...............................................................................................................21 Transmittance & Attenuation Requirements ....................................................................................23 Test Methods ...................................................................................................................................24 Identification....................................................................................................................................33 Technical Addendum to Impact Testing ..............................................................................35 Recommended System for Visually Inspecting Lens for Defects........................................39 The Boxing System of Measurement..................................................................................40 Optical and Mechanical Tolerances Summary....................................................................41 Bibliography ........................................................................................................................42

Annex A Annex B Annex C Annex D Annex E

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American National Standard

Z80.1-2005: Draft 9/4/04Foreword (This foreword is not part of American National Standard Z80.1-2005) The Z80 Standards Committee for Ophthalmic Lenses was organized in 1956. Three separate standards were drafted, two relating to the manufacture of lenses and one to the fabrication of ophthalmic lenses into prescription eyewear. A standard relating mainly to lenses, but containing additional tolerances for a mounted pair, wasissued in 1964. The tolerances were based largely upon an analysis of measured parameters in typical single-vision, mass-produced lenses assembled into conservatively styled and sized mountings. The standard represented the state-of-the-art for such lenses and a set of quality goals for lenses surfaced in the ophthalmic laboratory on an individual basis. At the beginning of 1970, the StandardsCommittee Z80 was reorganized with the Optical Society of America, its former sponsor, serving as Secretariat. In 1972, the committee's scope was broadened to include lenses other than prescription glass ophthalmic lenses in recognition of the importance of plastic ophthalmic materials and the increased use of sunglasses and fashion eyewear. In the 1972 revision, certain tolerances for plastic andheat-treated lenses were relaxed in response to Federally mandated impact-resistant requirements for all ophthalmic lenses. The 1979 revision reflected a shift in utilization from mass-produced lenses to a basic dependence upon custom-processed lenses at the laboratory level. It was an attempt to define the state-of-the-art in the manufacturing laboratory by recognizing the fact that, while...