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11-07-10

“ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course. Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair). 11-07-10. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course.

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11-07-10

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  1. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 11-07-10

  2. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course • Introduction & Personal Background • Present responsibilities • Global Standards Mgr – Carl Zeiss Vision • Chair of Vision Council Len Technical Committee since 1997 • Chair of ANSI Z80.1 • Chair of ISO 14889 Fundamental Standard • Director of AO/ Optical Heritage Museum • http://www.opticalheritagemuseum.org • Background • Born and presently live in Southbridge • Employed by AO/SOLA/CZV since 1974 • Began in Materials Testing Lab conducted physical and optical testing for AO • QC work/ engineering for AOLITE CR-39 process • Lens Design –SF Aspheric Aspherlite &AO55 • Design implementation -AO Pro Easy , AO Compact 1954 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 11-07-10

  3. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course Course topic outline ANSI Z80.1 Prescription Lens Standard scope / purpose/makeup of experts – 5 min General History of Standard- 5 min Must I comply?- 5 min What’s new ? 5 min ANSI Research for this revision – 10min ANSI 2010- Compliance with Power tolerances just got easier – 10 min ANSI Cyl Axis tolerances of 2005 and 2010 – adopted by ISO - 5 min What about the next revision – any suggestions? 3 min Feedback / Questions / comments – 2 min Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:05

  4. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course ANSI Z80.1 Prescription Lens Standard scope / purpose/makeup of experts – 5 min Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:10

  5. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course ANSI Z80.1 Prescription Lens Standard scope / purpose /makeup of experts – cont Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair)

  6. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course ANSI Z80.1 makeup of experts from 18 org Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair)

  7. Historic ANSI Z80.1 Spectacle Lens Documents: In 1956, the ANSI Z80 Standards Committee for Ophthalmic Lenses was organized. First Standard applying to lenses and included mounting tolerances was issued in 1964 ANSI Z80.1 - 1964  Cr. Carl R. Rudolph - Chairman ANSI Z80.1 - 1972 Arthur H. Keeney - Chair The 1972 Standard included "relaxed" tolerances for plastic and heat treated lenses. ANSI Z80.1 - 1979 Arthur H.  Keeney - Chair Shifted to Mass produced lenses, away from factory finished. The title was changed from requirement to recommendation. ANSI Z80.1 - 1987Jeff Kosh  - Chair More definitions, tutorials, and UV absorbance in lens materials addressed. ANSI Z80.1 - 1995Jeff Kosh  - Chair Adopted ISO power tolerances, which turned out to be a mistake that took 15 years to fully correct. ANSI Z80.1 - 1999 Jeff Kosh  - Chair Initial changes that loosened, but did not eliminate ISO power tolerance approach ANSI Z80.1- 2005  Dan Torgersen - Chair Significant change to the Axis angle tolerance was made.  ANSI Z80.1 -2010  Dan Torgersen - Chair Published in July 2010 “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course General History of Standard- 5 min Historic ANSI Z80.1 Spectacle Lens Documents: In 1956, the ANSI Z80 Standards Committee for Ophthalmic Lenses was organized. First Standard applying to lenses and included mounting tolerances was issued in 1964 ANSI Z80.1 - 1964  Cr. Carl R. Rudolph - Chairman ANSI Z80.1 - 1972 Arthur H. Keeney - Chair The 1972 Standard included "relaxed" tolerances for plastic and heat treated lenses. This version included tolerances for off-axis performance for SV lenses, which were subsequently dropped in the next revision. ANSI Z80.1 - 1979 Arthur H.  Keeney - Chair Shifted to Mass produced lenses, away from factory finished. The title was changed from requirement to recommendation. Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:15

  8. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course General History of Standard- cont. ANSI Z80.1 - 1987  Jeff Kosh- Chair More definitions, tutorials, and UV absorbance in lens materials addressed. ANSI Z80.1 - 1995  Jeff Kosh - Chair Adopted ISO power tolerances by each meridian, which turned out to be a mistake that took 15 years to fully correct. ANSI Z80.1 - 1999  Jeff Kosh - Chair Initial changes that loosened, but did not eliminate ISO power tolerance approach. ANSI Z80.1- 2005  Dan Torgersen - Chair Significant change to the Axis angle tolerance was made, to Reflect capabilities without compromise to wearer.  ANSI Z80.1 -2010  Dan Torgersen – Chair Published in July 2010 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair)

  9. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course • Must I comply?- 5 min • Since 1979, the ANSI Z80.1 standard has been a recommendation, not a requirement • They are recommended guidelines, which when followed will help to deliver quality product to the consumer. • It is highly desirable to strive to meet this standard, but strict compliance is not always possible as noted in the Purpose section of ANSI Z80.1 . • While ANSI is not a requirement , local and state laws may dictate otherwise (NJ, CA). • ANSI Standards bodies strive for minimum requirements, in order not to restrict trade or inhibit new and different technologies. Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:20

  10. Power tolerance method revision: The 2010 standard applies tolerances to the measured sphere and cyl (- notation) for a given RX “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 4. What’s new? 5 min • Power tolerance method revision: • The 2010 standard applies tolerances to the measured sphere and cyl (- notation) for a given RX  • As worn correction for Rx ‘s permitted • A clarification was added to permit tolerancing of an RX to the as worn corrected value, • rather than the Rx as written by the Doctor. It reads “For lenses produced with • compensations to account for as worn correction, the tolerances in the tables in section • 5.0 apply to those values specified by the manufacturer, and not to the prescribed RX.” • Relaxation of Cyl Axis tolerance for weak cyls (first adopted in 2005, reaffirmed and adopted by ISO • Adoption ISO 8980-4&5 into ANSI Z80.1 -2010 • ISO 8980-4 (AR Durability test method) standard was adopted in full • ISO 8980-5 (Minimum Abrasion resistance if claimed) was also adopted in full. • If abrasion claims to a lens surface or surfaces are made, this test requirement must be satisfied. Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:25

  11. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) 5. ANSI Research for this revision – 5 min • The following set of slides were presented resulting from a study of Focimeter power measurement practices determined from a questionnaire that I developed and was circulated on line to the Optician Association of America (OAA). • The feedback from this study convinced the ANSI Z80.1 committee to change the standard to comply with these practices.

  12. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) 5. ANSI Research for this revision – 5 min • At a the Fall 2007 ANSI Z80 meeting, Dick Whitney agreed to work on a questionnaire to determine industry practices in power measurement. Joe Dezenzo (Luxottica Retail) volunteered to assist. • In Dec 2007, Dick drafted a set of questions and sent to Joe Dezenzo (Luxotttica) who agree to coordinate sending them out; Joe coordinated an on line “Zoomerang” internet questioning method.

  13. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Let’s review the outcome! Number of OAA participants= 331 in the following categories:

  14. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 1 Response – Type of Instrument

  15. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 2: Cyl Mode output (where it applies)

  16. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 3: Increment rounding (where it applies)

  17. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 4: What Standards / Specs do you use?

  18. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 5: Where do you keep your Specs?

  19. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 6: When did you last update your Specs?

  20. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 7: What do you do when lens is out for power?

  21. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) * Question 8: Do you use a computer to see if the lens meets your power tolerances?

  22. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) • 9.) Intended question: Do you tolerance both the sphere and cyl meridians along with the cyl, or just sphere and cylinder? • Just for review: <= Meridian 1 Image Meridian 2 Image  Sphere image (equally focused lines) Cyl (written in Rx and displayed on automated focimeters) = Sum of Mer 1 and Mer 2 Measured values; it does not have an image!

  23. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Question 9: What meridians / values do you tolerance?

  24. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) • Prescribed Rx: +0.25=-3.25 x 103 Measured Rx: +0.37= -3.18 x 103 Question 10: • Would you pass or fail this lens for power? • So which answer is correct? • The Answer is….

  25. Optician Association of America (OAA) “Zoomerang” response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) • It depends on what tolerances / specifications you are using… Question 10: • Prescribed Rx: +0.25=-3.25 x 103 Measured Rx: +0.37= -3.18 x 103 • For those 67% who would pass the lens, they are using “common US Industry practice” and neither ANSI 1995 / 2005 or ISO 8980…

  26. Here is how “Common US Industry practice” would have passed the lens: • Record prescribed RX: OD: +.25 = -3.25 x 103 • Measure fabricated RX: • Is sphere error > .13? • Absolute difference is .12, therefore sphere power acceptable • Is cyl error > .13? • Absolute difference is .07 and axis is 103 as prescribed, cyl is acceptable. • Therefore, the lens Passes for power inspection

  27. Here is how one might fail the lens using ANSI standards since 1995 (~ISO) The lens fails ISO tolerances for a power that is not displayed on the Focimeter, but must be calculated. It is also a failure to ANSI Z80.1 because of strongest meridian error, but few labs ever apply this. It passes the common practice of tolerancing the sphere and cyl.

  28. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 6. ANSI 2010 – Compliance with the power tolerances just got easier - Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:40

  29. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 7. ANSI Cyl Axis tolerances of 2005 and 2010 – adopted by ISO - 5 min Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:45

  30. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 8. What about the next revision – any suggestions? 9. Feedback / Questions / Comments ? Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 1:50

  31. “ANSImplified” – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course Thank you for your attention!!! Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 11-07-10

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