Presentation is loading. Please wait.

Presentation is loading. Please wait.

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

Similar presentations


Presentation on theme: "11-07-10 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) ANSImplified – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians."— Presentation transcript:

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

2 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 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 Fundamental Standard Director of AO/ Optical Heritage Museum 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

3 1:05 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) ANSImplified – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course Course topic outline 1.ANSI Z80.1 Prescription Lens Standard scope / purpose/makeup of experts – 5 min 2.General History of Standard- 5 min 3.Must I comply?- 5 min 4.Whats new ? 5 min 5.ANSI Research for this revision – 10min 6.ANSI Compliance with Power tolerances just got easier – 10 min 7.ANSI Cyl Axis tolerances of 2005 and 2010 – adopted by ISO - 5 min 8.What about the next revision – any suggestions? 3 min 9.Feedback / Questions / comments – 2 min

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

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

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

7 1:15 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) ANSImplified – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 2.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 Z ANSI Z Cr. Carl R. Rudolph - Chairman ANSI Z ANSI Z Arthur H. Keeney - Chair The 1972 Standard included "relaxed" tolerances for plastic and heat treated lenses. ANSI Z ANSI Z Arthur H. Keeney - Chair Shifted to Mass produced lenses, away from factory finished. The title was changed from requirement to recommendation. ANSI Z ANSI Z Jeff Kosh - ChairJeff Kosh More definitions, tutorials, and UV absorbance in lens materials addressed. ANSI Z ANSI Z Jeff Kosh - ChairJeff Kosh Adopted ISO power tolerances, which turned out to be a mistake that took 15 years to fully correct. ANSI Z ANSI Z Jeff Kosh - ChairJeff Kosh Initial changes that loosened, but did not eliminate ISO power tolerance approach ANSI Z ANSI Z Dan Torgersen - Chair Significant change to the Axis angle tolerance was made. ANSI Z ANSI Z Dan Torgersen - Chair Published in July 2010 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 Z ANSI Z Cr. Carl R. Rudolph - Chairman ANSI Z ANSI Z 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 Z ANSI Z Arthur H. Keeney - Chair Shifted to Mass produced lenses, away from factory finished. The title was changed from requirement to recommendation.

8 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) ANSImplified – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 2.General History of Standard- cont. ANSI Z ANSI Z Jeff Kosh- Chair More definitions, tutorials, and UV absorbance in lens materials addressed. ANSI Z ANSI Z 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 Z ANSI Z Jeff Kosh - Chair Initial changes that loosened, but did not eliminate ISO power tolerance approach. ANSI Z ANSI Z Dan Torgersen - Chair Significant change to the Axis angle tolerance was made, to Reflect capabilities without compromise to wearer. ANSI Z ANSI Z Dan Torgersen – Chair Published in July 2010

9 1:20 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) ANSImplified – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 3.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.

10 1:25 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) ANSImplified – A Practical Application of Z80.1 By Dick Whitney – Nov 7, 2010 MA Opticians ABO Course 4. Whats new? 5 min Power tolerance method revision: The 2010 standard applies tolerances to the measured sphere and cyl (- notation) for a given RX 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 &5 into ANSI Z ISO (AR Durability test method) standard was adopted in full ISO (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.

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) 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. 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.

13 Optician Association of America (OAA) Zoomerang response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Wholesale LabRetail ChainO.D. OfficeM.D. OfficePrivate OpticianOther, please specify Lets review the outcome! Number of OAA participants= 331 in the following categories: 4%20%21%18%29%8%

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 Automatic19% Manually focusing65% Manually focusing digital3% Both32%

15 Optician Association of America (OAA) Zoomerang response to Questions on power measurement practices – Dick Whitney (CZV) / Joe Dezenzo (Luxottica Retail) Minus cyl (-)82% Plus cyl (-)18% 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? Internal / Co Specifications14% ANSI Z80.183% ISO 89800% Other3%

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? Next to the Lensometer70% In a drawer19% Not sure5% Do not have any on site7%

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? Less than five years72% Six to ten years8% More than ten years3% Don't know17%

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? Re-measure on same instrument without moving lens33% Re-measure on same instrument, moving lens57% Measure on another instrument46% Reject lens without re-measurement13% Other, please explain15%

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? Yes7% No93%

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? Sphere image (equally focused lines) <= Meridian 1 Image Meridian 2 Image Just for review: 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? Sphere and Cyl separate76% Both Sphere/Cyl Meridians22% Don't know2%

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

26 Record prescribed RX: OD: +.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 Here is how Common US Industry practice would have passed the lens:

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 1:40 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 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 -

29 1:45 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 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

30 1:50 Dick Whitney (Carl Zeiss Vision / ANSI Z80.1 Chair) 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 ?

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


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

Similar presentations


Ads by Google