How Do You Know Your Lens Is The Right Power? (Part Three)

By Dick Whitney – Carl Zeiss Vision
Executive Director – Optical Heritage Museum
Chair of ANSI Z80.1 and the Vision Council Lens Technical Committee

Wednesday, June 10, 2015 10:05 AM I was fortunate to have access to the NBS 1916 calibration set, from which I was able to make my own secondary set, which I still use today. Since I had confidence in their powers, it has proved especially useful. What does one do if there is a need to assess an instrument but one does not have such a set?

How Do You Know Your Lens Is The Right Power? (Part Two)

By Dick Whitney – Carl Zeiss Vision
Executive Director – Optical Heritage Museum
Chair of ANSI Z80.1 and the Vision Council Lens Technical Committee

Wednesday, May 27, 2015 1:07 PM In Part One of this three-part series, I described the history and early use the American Optical (AO) “NBS Truepower lens set” developed in 1916, which was used to assess the calibration of the AO Lensometer when first introduced to the market.

How Do You Know Your Lens Is The Right Power? (Part One)

By Dick Whitney – Carl Zeiss Vision
Executive Director – Optical Heritage Museum
Chair of ANSI Z80.1 and Vision Council Lens Technical Committee

Tuesday, May 12, 2015 3:00 PM I was recently asked what I thought was the most valuable item in the Optical Heritage Museum collection.

Why Conventional Bifocals Are Reversed To Properly Measure The Addition Power of a Bifocal Lens

By Dick Whitney – Carl Zeiss Vision
Chair of ANSI Z80.1 and Vision Council Lens Technical Committee

Wednesday, April 1, 2015 11:30 AM The topic of measuring bifocal add powers is a common source of confusion in the industry.

Being Involved In Our Profession Can Make a Difference

By Dick Whitney (ANSI Z80.1 Chairman)
Tuesday, June 10, 2014 3:00 PM In a previous Opticians Handbook article, I gave a general overview of the evolution of the ANSI Z80.1 standard and how it has changed over time.

The Evolution of ANSI Z80.1 Spectacle Lens Standards

By Dick Whitney (ANSI Z80.1 Chairman)
Tuesday, February 11, 2014 3:10 PM "I follow ANSI Standards when inspecting mounted lenses prior to dispensing."

New Lensometry iPad App

By Staff
Wednesday, September 18, 2013 6:29 PM

Digital can be a wonderful tool and in his interactive book on Lensometry, Mark Bullimore, MCOptom, PhD, FAAO brings learning the Lensometer to life through interactive video and an embedded glossary.

Manual vs. Automated Lens Meters: A Primer, Part 3

By Barry Santini, ABOC, ABO-AC, ABOM
Monday, February 4, 2013 2:00 PM In our last installment, it looked like an automated lens meter's arsenal of extreme precision, standards compliance, Abbe value compatibility, lens identification, instant transposition and extensive office-interface capabilities would trump a manual model on any given day.

Manual vs. Automated Lens Meters: A Primer, Part 2

By Barry Santini, ABOC, ABO-AC, ABOM
Monday, January 28, 2013 2:33 PM When the first automated lens meters arrived on the scene about three decades ago, they were heralded as the way of the future. Extremely precise readings, coupled with the reduced operator error were amongst the initial attractions.

Manual vs. Automated Lensometry: A Primer, Part 1

By Barry Santini, ABOC, ABO-AC, ABOM
Thursday, January 17, 2013 4:08 PM There isn't a optical school in the country that doesn't spend a great deal of time training their student on how use a traditional lens meter for lens and prescription verification, and with good reason.

Lensometer, Vertometer or Lensmeter

By Staff
Sunday, November 27, 2011 9:32 PM

Factoid: There are lots of names for lensmeters i.e., the instruments that measure lens power and optical center or prism location. It's a bit like Kleenex.

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