Ocular Effects of Hypertension

By Benjamin Betines, Raritan Community College
Tuesday, September 23, 2014 10:00 AM High blood pressure is not only bad for your cardiovascular system but for your eyes and vision as well. At least 50 million Americans suffer from hypertension. Uncontrolled high blood pressure increases the risk of serious health problems, including heart disease, stroke, and hypertensive retinopathy.

Remembering Darryl Meister

By Dick Whitney, Carl Zeiss Vision
Tuesday, September 16, 2014 11:30 AM As I write this article, more than a month has passed since I learned of the sudden and unexpected death of my friend and colleague Darryl Meister. The impact of his death to the optical community (which he loved and served so effectively) has not been fully recognized.

Color Vision Deficiencies

By Hyun S. Lee, Raritan Community College
Tuesday, September 09, 2014 11:00 AM As a human, one of the first things that newborn babies experience when they get through a mother’s womb is facing the light.

In Memory of Darryl Meister

By Staff
Tuesday, September 09, 2014 10:00 AM In honor of the contributions to Ophthalmic Optics and Opticianry by Darryl Meister, we've created this forum to showcase the works of students of optics. Darryl was a celebrated student of optics that shared his knowledge and perspectives openly with all. This section of The 20/20 Opticians Handbook is dedicated to Darryl.

Converting Prism Into an Order

By Mark Mattison-Shupnick, ABOM
Tuesday, August 26, 2014 11:00 AM The Opticians Handbook received this question about a prism Rx for a patient experiencing vertigo:
"I recently got a prescription where the doctor asked for 1.5 degrees of prism base down at axis 255 right and 1.5 degree base down in the left at axis 255. What should I order? The doctor told me to order 1.1 base down with 0.50 Base Out right and 1.1 Base Down with 0.50 Base In."

Opticianry in Germany

By Maggie Sayers, ABOM
Wednesday, August 20, 2014 1:30 PM Lou Holtz is a famous football coach and a master motivational speaker. I wonder how he would coach American opticians to prepare for the future.

Material Choice for Various Lifestyles, and Your Practice

By Dick Whitney
Carl Zeiss Vision, Manager Industry Standards
ANSI Z80.1 Chair, Vision Council Lens Tech Committee Chair

Monday, August 04, 2014 11:00 AM In 1972, President Nixon signed into law what is referred to today as the "FDA Impact regulation." This regulation, otherwise known as Title 21 CFR 801.410, has continues to influence our industry to this day.

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.

Lens Materials Are Changing: Are You Ahead of the Curve?

By Johnna Dukes, ABOC
Wednesday, May 21, 2014 11:00 AM Glass, Polycarbonate, CR-39, Trivex, 1.60... So many lenses, so little time! Do you ever find yourself overwhelmed by the amount of lens material options available on today's market?

A Few Things About UV, Photochromics and the Car

By Mark Mattison-Shupnick, ABOM
Tuesday, May 13, 2014 3:30 PM I received this question from a colleague, "Why is sunscreen recommended for when riding in the car? I've always been taught that the windshield absorbs UV. That's why photochromics didn't work in the car. Who's telling the truth?

Glass? Really?

By Mindi Lewis, MA. ABOC, FNAO, Managing Editor
Wednesday, April 16, 2014 2:00 PM A few weeks back a pleasant gentleman in his 60s was in our office and delivered to my dispensing table. We chatted about his prescription and when he wears his glasses most. He then pulled out his current glasses and they were a circa 1970 gold metal, modified aviator with a unifit bridge in a 59 eye size. As soon as his glasses were in my hand I realized—these lenses are glass, and very heavy indeed. Immediately I began thinking how happy he would be in his new polycarbonate lenses in a new smaller frame. Quickly I discovered my plan was not his plan. He explained he liked his frame and might even like a larger size. I decided to work on the frame first and then discuss the lenses. I showed him some metal frames in a 54 and 56 eye size as I explained patients often believe they have more viewing area when they have a large lens—but actually it was like walking up to a window or looking through a keyhole.

Slab-off, Reverse Slab-off and Bi-centric Grinding

By Andrew S. Bruce, ABOM
Tuesday, February 18, 2014 1:00 PM The most common way of correcting vertical imbalance is to induce a vertical prismatic effect in the lower half of one lens. This type of correction is referred to as bi-centric grinding, or slab-off.

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."

Verification of Slab-off

By Andrew S. Bruce, ABOM
Monday, February 03, 2014 10:30 AM There are two ways basic ways to verify slab-off: Comparing the vertical prismatic effects of the two lenses through a lensometer and checking for actual image displacement at the reading level.

A Prism Tutorial, Part 3

By Andrew S. Bruce, ABOM
Tuesday, December 03, 2013 3:51 PM First, it is an effect of the prescription as determined by the doctor, so we cannot fix it, but we can correct for it. Some methods are capable of correcting for more imbalance than others.