20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

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Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. IT'S AS EASY AS A, B, DBL Hold the ruler over the frame front and sight an imaginary line from the farthest edge of a box touching the left temporal lens edge of the right eye to the right edge of the box. That's the A dimension. Next, measure the DBL or "bridge" size. Lastly, turn the ruler and measure the "B" or vertical size of the lens. ALL ABOUT THAT BASE (CURVE) All About That BASE (CURVE) By Barry Santini. Probably no topic is arguably more confusing, misunderstood or under-appreciated than how the choice of lens base curve can impact the optics, fit and cosmetics of a new pair of prescription glasses. For a long time it’s been far too convenient to target one of the above three, make it your top

PRISM MADE EASY

Prism Made Easy. When checking a prescription, most opticians have an easy time finding and dotting a lens optical center. The center of the lensometer target is moved until it is in the center of the eyepiece reticle. Often the prescription that includes prescribed prism ends up passed to someone else with the words "Here, you do this." LESSON: - 20/20 MAGSEE MORE ON 2020MAG.COM ANTI-FATIGUE LENSES: RX FOR OVERWORKED EYES The new products, known as anti-fatigue or AF lenses, offer patients relief from digitally induced eyestrain and other visual stress. AF lenses are versatile and can be worn for many near and intermediate visual tasks, not just computer use. Doctors and dispensers may find it helpful to think of them as occupational and recreational lenses

that

WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

SIGN IN - 20/20 MAG

Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. IT'S AS EASY AS A, B, DBL Hold the ruler over the frame front and sight an imaginary line from the farthest edge of a box touching the left temporal lens edge of the right eye to the right edge of the box. That's the A dimension. Next, measure the DBL or "bridge" size. Lastly, turn the ruler and measure the "B" or vertical size of the lens. ALL ABOUT THAT BASE (CURVE) All About That BASE (CURVE) By Barry Santini. Probably no topic is arguably more confusing, misunderstood or under-appreciated than how the choice of lens base curve can impact the optics, fit and cosmetics of a new pair of prescription glasses. For a long time it’s been far too convenient to target one of the above three, make it your top

PRISM MADE EASY

Prism Made Easy. When checking a prescription, most opticians have an easy time finding and dotting a lens optical center. The center of the lensometer target is moved until it is in the center of the eyepiece reticle. Often the prescription that includes prescribed prism ends up passed to someone else with the words "Here, you do this." LESSON: - 20/20 MAGSEE MORE ON 2020MAG.COM ANTI-FATIGUE LENSES: RX FOR OVERWORKED EYES The new products, known as anti-fatigue or AF lenses, offer patients relief from digitally induced eyestrain and other visual stress. AF lenses are versatile and can be worn for many near and intermediate visual tasks, not just computer use. Doctors and dispensers may find it helpful to think of them as occupational and recreational lenses

that

WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

LESSON: DELIVERING DURABILITY LIKE NEVER BEFORE FOR NO Delivering Durability Like Never Before for No-Glare Lens Wearers with the new Crizal® Rock™ Lens. Pete Hanlin, ABOM. Release Date: June 9, 2021 Expiration Date: June 30, TAKING PDS - 20/20 MAG Taking PDs. A PD is the distance between the visual axes of the two eyes. It can be measured manually with a ruler or automatically using a pupillometer. The pupillometer is more accurate as well as more consistent. Place the nose pads on the patient’s nose with the forehead bar in place helping to center the instrument on the nose.

FASHIONABLY GREEN

Green has a fascinating history in the optical world. For as long as there’s been even a vague concept of optics, green has been known for its relaxing qualities, and some of the earliest records we have of “sunglasses” refer to green lenses. In his work Natural History, Pliny the Elder described how the Roman Emperor Nero would watch gladiator matches through an emerald. VISION: THE COMPETITIVE EDGE After a winter that may have seemed longer than usual, professional and amateur athletes alike are rushing for the great outdoors. They’re honing skills that may have become a bit rusty from lack of practice, searching for that competitive edge. They’re abandoning comfort food for good nutrition to gain strength, speed, and stamina. Do they know that nutrition can enhance one the most IOT FREE-FORM INSIGHTS PART 13 Why compensate lenses? Free-form lens design and surfacing technology compensate the lens surface, making the effective power perceived by the patient in the primary gaze position match the prescribed power given by the refracting doctor. Why are they not the same? Short answer: The trial lenses used to refract the patient are flat and sit perpendicular to the patient’s visual axis in the SLAB-OFF, REVERSE SLAB-OFF AND BI-CENTRIC GRINDING Slab-off, Reverse Slab-off and Bi-centric Grinding. 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. It can be used HARD COATING SYSTEMS Hard Coating Systems. Performance and versatility can be greatly improved by using them in combination with a primer. The combination of hardcoat and primer are often referred to as a hardcoating system. The primer provides adhesion to multiple substrates, impact resistance and tintability. The hardcoat provides abrasion and scratch resistance

ANSI TOLERANCE

Remember, the compensated lens power makes the effective power of the lens equal to the written prescription in the way that the lenses are positioned in front of the eyes considering vertex, tilt and wrap angles. Therefore, using the lab invoice, find the compensated lens power and when checking in lenses, apply the latest of ANSI Z80.1 STRENGTHENING THE LAB-ECP PARTNERSHIP TO IMPROVE PATIENT By Sarah McGoldrick. In an era where online shopping has become the new normal, eyecare providers have had to find new and innovative ways to boost customer loyalty. POLISHED LENS EDGES, FRIEND OR FOE? PROS. A common school of thought is that if the edge of the lens will be exposed (as they would be with both semi-rimless and drilled rimless frames) you should choose to have those edges polished in order to enhance the aesthetic of the finished glasses. By polishing the edges of these lenses you help to create the "invisible" look of

lenses

20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

SIGN IN - 20/20 MAG

Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. IT'S AS EASY AS A, B, DBL Hold the ruler over the frame front and sight an imaginary line from the farthest edge of a box touching the left temporal lens edge of the right eye to the right edge of the box. That's the A dimension. Next, measure the DBL or "bridge" size. Lastly, turn the ruler and measure the "B" or vertical size of the lens. ALL ABOUT THAT BASE (CURVE) All About That BASE (CURVE) By Barry Santini. Probably no topic is arguably more confusing, misunderstood or under-appreciated than how the choice of lens base curve can impact the optics, fit and cosmetics of a new pair of prescription glasses. For a long time it’s been far too convenient to target one of the above three, make it your top

PRISM MADE EASY

Prism Made Easy. When checking a prescription, most opticians have an easy time finding and dotting a lens optical center. The center of the lensometer target is moved until it is in the center of the eyepiece reticle. Often the prescription that includes prescribed prism ends up passed to someone else with the words "Here, you do this." LESSON: - 20/20 MAGSEE MORE ON 2020MAG.COM ANTI-FATIGUE LENSES: RX FOR OVERWORKED EYES The new products, known as anti-fatigue or AF lenses, offer patients relief from digitally induced eyestrain and other visual stress. AF lenses are versatile and can be worn for many near and intermediate visual tasks, not just computer use. Doctors and dispensers may find it helpful to think of them as occupational and recreational lenses

that

WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

SIGN IN - 20/20 MAG

Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. IT'S AS EASY AS A, B, DBL Hold the ruler over the frame front and sight an imaginary line from the farthest edge of a box touching the left temporal lens edge of the right eye to the right edge of the box. That's the A dimension. Next, measure the DBL or "bridge" size. Lastly, turn the ruler and measure the "B" or vertical size of the lens. ALL ABOUT THAT BASE (CURVE) All About That BASE (CURVE) By Barry Santini. Probably no topic is arguably more confusing, misunderstood or under-appreciated than how the choice of lens base curve can impact the optics, fit and cosmetics of a new pair of prescription glasses. For a long time it’s been far too convenient to target one of the above three, make it your top

PRISM MADE EASY

Prism Made Easy. When checking a prescription, most opticians have an easy time finding and dotting a lens optical center. The center of the lensometer target is moved until it is in the center of the eyepiece reticle. Often the prescription that includes prescribed prism ends up passed to someone else with the words "Here, you do this." LESSON: - 20/20 MAGSEE MORE ON 2020MAG.COM ANTI-FATIGUE LENSES: RX FOR OVERWORKED EYES The new products, known as anti-fatigue or AF lenses, offer patients relief from digitally induced eyestrain and other visual stress. AF lenses are versatile and can be worn for many near and intermediate visual tasks, not just computer use. Doctors and dispensers may find it helpful to think of them as occupational and recreational lenses

that

WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

LESSON: DELIVERING DURABILITY LIKE NEVER BEFORE FOR NO Delivering Durability Like Never Before for No-Glare Lens Wearers with the new Crizal® Rock™ Lens. Pete Hanlin, ABOM. Release Date: June 9, 2021 Expiration Date: June 30, TAKING PDS - 20/20 MAG Taking PDs. A PD is the distance between the visual axes of the two eyes. It can be measured manually with a ruler or automatically using a pupillometer. The pupillometer is more accurate as well as more consistent. Place the nose pads on the patient’s nose with the forehead bar in place helping to center the instrument on the nose.

FASHIONABLY GREEN

Green has a fascinating history in the optical world. For as long as there’s been even a vague concept of optics, green has been known for its relaxing qualities, and some of the earliest records we have of “sunglasses” refer to green lenses. In his work Natural History, Pliny the Elder described how the Roman Emperor Nero would watch gladiator matches through an emerald. VISION: THE COMPETITIVE EDGE After a winter that may have seemed longer than usual, professional and amateur athletes alike are rushing for the great outdoors. They’re honing skills that may have become a bit rusty from lack of practice, searching for that competitive edge. They’re abandoning comfort food for good nutrition to gain strength, speed, and stamina. Do they know that nutrition can enhance one the most IOT FREE-FORM INSIGHTS PART 13 Why compensate lenses? Free-form lens design and surfacing technology compensate the lens surface, making the effective power perceived by the patient in the primary gaze position match the prescribed power given by the refracting doctor. Why are they not the same? Short answer: The trial lenses used to refract the patient are flat and sit perpendicular to the patient’s visual axis in the SLAB-OFF, REVERSE SLAB-OFF AND BI-CENTRIC GRINDING Slab-off, Reverse Slab-off and Bi-centric Grinding. 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. It can be used HARD COATING SYSTEMS Hard Coating Systems. Performance and versatility can be greatly improved by using them in combination with a primer. The combination of hardcoat and primer are often referred to as a hardcoating system. The primer provides adhesion to multiple substrates, impact resistance and tintability. The hardcoat provides abrasion and scratch resistance

ANSI TOLERANCE

Remember, the compensated lens power makes the effective power of the lens equal to the written prescription in the way that the lenses are positioned in front of the eyes considering vertex, tilt and wrap angles. Therefore, using the lab invoice, find the compensated lens power and when checking in lenses, apply the latest of ANSI Z80.1 STRENGTHENING THE LAB-ECP PARTNERSHIP TO IMPROVE PATIENT By Sarah McGoldrick. In an era where online shopping has become the new normal, eyecare providers have had to find new and innovative ways to boost customer loyalty. POLISHED LENS EDGES, FRIEND OR FOE? PROS. A common school of thought is that if the edge of the lens will be exposed (as they would be with both semi-rimless and drilled rimless frames) you should choose to have those edges polished in order to enhance the aesthetic of the finished glasses. By polishing the edges of these lenses you help to create the "invisible" look of

lenses

20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

SIGN IN - 20/20 MAG

Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. CONTINUING EDUCATION In the February issue of 20/20 Magazine, Maryann Santos wrote a terrific Continuing Education course, “The State of Opticianry.” It shed light on the different avenues available to individuals from each state for licensure or certification and highlighted many organizations and state societies that need our voices and participation to help elevate the trajectory of the professional

optician.

HARD COATING SYSTEMS Hard Coating Systems. Performance and versatility can be greatly improved by using them in combination with a primer. The combination of hardcoat and primer are often referred to as a hardcoating system. The primer provides adhesion to multiple substrates, impact resistance and tintability. The hardcoat provides abrasion and scratch resistance FITTING HEIGHT CONSIDERATIONS Fitting Height Considerations. Precise segment and progressive fitting heights, first time, teach patients that you understood their vision needs. Be sure to consider the fitting height of their old glasses, their posture, work tasks, leisure and driving needs. Separate the measurements for indoor and outdoor eyewear. They can be different. WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

L&T TIPS: EDGER BASICS L&T Tips: Edger Basics. Whether an upgrade or a new installation, dispensers consider an in-office finishing lab for three reasons — to improve their bottom line, to improve the speed of delivering eyewear to their patients, and to maintain a consistent level of quality on that eyewear. TIPS FOR USING VARIABLE CORRIDOR PAL’S If you’ve looked at the newest releases in Progressive Lens Designs, you will notice that you have approximately one bazillion choices when it comes to choosing the corridor length in your favorite Progressive Lens. If you’re not 100% certain on how to make the best choice for your patient regarding corridor length, here are a few tips to help clear the sometimes muddy water.

20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

SIGN IN - 20/20 MAG

Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. CONTINUING EDUCATION In the February issue of 20/20 Magazine, Maryann Santos wrote a terrific Continuing Education course, “The State of Opticianry.” It shed light on the different avenues available to individuals from each state for licensure or certification and highlighted many organizations and state societies that need our voices and participation to help elevate the trajectory of the professional

optician.

HARD COATING SYSTEMS Hard Coating Systems. Performance and versatility can be greatly improved by using them in combination with a primer. The combination of hardcoat and primer are often referred to as a hardcoating system. The primer provides adhesion to multiple substrates, impact resistance and tintability. The hardcoat provides abrasion and scratch resistance FITTING HEIGHT CONSIDERATIONS Fitting Height Considerations. Precise segment and progressive fitting heights, first time, teach patients that you understood their vision needs. Be sure to consider the fitting height of their old glasses, their posture, work tasks, leisure and driving needs. Separate the measurements for indoor and outdoor eyewear. They can be different. WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

L&T TIPS: EDGER BASICS L&T Tips: Edger Basics. Whether an upgrade or a new installation, dispensers consider an in-office finishing lab for three reasons — to improve their bottom line, to improve the speed of delivering eyewear to their patients, and to maintain a consistent level of quality on that eyewear. TIPS FOR USING VARIABLE CORRIDOR PAL’S If you’ve looked at the newest releases in Progressive Lens Designs, you will notice that you have approximately one bazillion choices when it comes to choosing the corridor length in your favorite Progressive Lens. If you’re not 100% certain on how to make the best choice for your patient regarding corridor length, here are a few tips to help clear the sometimes muddy water. EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

LESSON: - 20/20 MAG

Free-form surfacing, also referred to as direct or digital surfacing, refers to a process that is capable of producing complex surface shapes, including aspheric, atoric and even progressive addition surfaces. A typical process begins by generating the lens surface using a three-axis, computer numerically controlled (or CNC)

generator.

IT'S AS EASY AS A, B, DBL Hold the ruler over the frame front and sight an imaginary line from the farthest edge of a box touching the left temporal lens edge of the right eye to the right edge of the box. That's the A dimension. Next, measure the DBL or "bridge" size. Lastly, turn the ruler and measure the "B" or vertical size of the lens. TAKING PDS - 20/20 MAG Taking PDs. A PD is the distance between the visual axes of the two eyes. It can be measured manually with a ruler or automatically using a pupillometer. The pupillometer is more accurate as well as more consistent. Place the nose pads on the patient’s nose with the forehead bar in place helping to center the instrument on the nose. WINNING THE HIGH-INDEX NUMBERS GAME Winning the High-Index Numbers Game. High-index plastic lenses can greatly improve the eyeglasses you build. Using a high-index lens material—one with an index of refraction ranging from 1.60 to 1.74—can reduce lens thickness and weight, making eyeglasses comfortable and cosmetically appealing. High-index lenses can also be

used to improve

ADVICE FROM MS. SPECS IN THE CITY We envisioned this to be an interactive advice column like “Dear Abby.”. We decided our version would be “Dear Ms. Specs in the City.”. My inspiration for this is the book, Miss Manners’ Guide to Excruciatingly Correct Behavior by Judith Martin. Originally published in 1982, it is amazing how topics of manners from the past

are still

TIPS FOR USING VARIABLE CORRIDOR PAL’S If you’ve looked at the newest releases in Progressive Lens Designs, you will notice that you have approximately one bazillion choices when it comes to choosing the corridor length in your favorite Progressive Lens. If you’re not 100% certain on how to make the best choice for your patient regarding corridor length, here are a few tips to help clear the sometimes muddy water.

THE FITTING CROSS:

The Fitting Cross is an important landmark for fitting PAL lenses of all kinds. As such, it deserves a careful look and some analysis. It is an industry-agreed-upon marker that can serve you well if you want to deliver the best PAL technology when fitting progressive addition lenses (PALs). Oddly, it doesn’t represent any point in a lens of L&T TIPS: EDGER BASICS L&T Tips: Edger Basics. Whether an upgrade or a new installation, dispensers consider an in-office finishing lab for three reasons — to improve their bottom line, to improve the speed of delivering eyewear to their patients, and to maintain a consistent level of quality on that eyewear. LESSON: WHY YOU DON'T WANT HOMONYMOUS HEMIANOPSIA AND WHAT Technical Level III Course STWJHI692-3. Homonymous Hemianopsia (HH) is extremely difficult to pronounce. It's even harder to live with. And to add to the confusion, hemianopsia can also be spelled as hemianopia. If you fancy Latin, the name tells you exactly what the condition is: Homonymous (same side) hemi (half) anopsia (blindness).

20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

SIGN IN - 20/20 MAG

Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. SLAB-OFF, REVERSE SLAB-OFF AND BI-CENTRIC GRINDING Slab-off, Reverse Slab-off and Bi-centric Grinding. 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. It can be used to

correct for

FITTING HEIGHT CONSIDERATIONS Fitting Height Considerations. Precise segment and progressive fitting heights, first time, teach patients that you understood their vision needs. Be sure to consider the fitting height of their old glasses, their posture, work tasks, leisure and driving needs. Separate the measurements for indoor and outdoor eyewear. They can be different.

PRISM MADE EASY

Prism Made Easy. When checking a prescription, most opticians have an easy time finding and dotting a lens optical center. The center of the lensometer target is moved until it is in the center of the eyepiece reticle. Often the prescription that includes prescribed prism ends up passed to someone else with the words "Here, you do this." WINNING THE HIGH-INDEX NUMBERS GAME Winning the High-Index Numbers Game. High-index plastic lenses can greatly improve the eyeglasses you build. Using a high-index lens material—one with an index of refraction ranging from 1.60 to 1.74—can reduce lens thickness and weight, making eyeglasses comfortable and cosmetically appealing. High-index lenses can also be

used to improve

NEW LENSES, OLD FRAMES In fact, using an old frame for new lenses is an odds-on favorite for eventual trouble. Even if the old frames have an up-to-date appearance, they will age faster and look ever more out of date during the life of their new lenses. If the old frames are discontinued, the patient needs to realize that if they break, their new lenses may not

fit

WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

20/20 MAGAZINE

20/20 Magazine is the optical industry's number one source for fashion trends, new products, new services and marketing activities for optical manufacturers, importers, distributors and retailers

SIGN IN - 20/20 MAG

Create My Account. Please enter your email and desired username. Email. Desired Username EDUCATION - 20/20 MAG 20/20's Resource for Education and Learning. From Our Pros To You.

Featured Content

CONTINUING EDUCATION 1 Hour - General Knowledge - Level I. 1 Hour - General Knowledge - Level II. 1 Hour - Technical - Level I. 1 Hour - Technical - Level II. 1 Hour - Technical - Level III. 2 Hours - Technical - Level II. Only ABO Courses. Only NCLE Courses. All Free Courses. SLAB-OFF, REVERSE SLAB-OFF AND BI-CENTRIC GRINDING Slab-off, Reverse Slab-off and Bi-centric Grinding. 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. It can be used to

correct for

FITTING HEIGHT CONSIDERATIONS Fitting Height Considerations. Precise segment and progressive fitting heights, first time, teach patients that you understood their vision needs. Be sure to consider the fitting height of their old glasses, their posture, work tasks, leisure and driving needs. Separate the measurements for indoor and outdoor eyewear. They can be different.

PRISM MADE EASY

Prism Made Easy. When checking a prescription, most opticians have an easy time finding and dotting a lens optical center. The center of the lensometer target is moved until it is in the center of the eyepiece reticle. Often the prescription that includes prescribed prism ends up passed to someone else with the words "Here, you do this." WINNING THE HIGH-INDEX NUMBERS GAME Winning the High-Index Numbers Game. High-index plastic lenses can greatly improve the eyeglasses you build. Using a high-index lens material—one with an index of refraction ranging from 1.60 to 1.74—can reduce lens thickness and weight, making eyeglasses comfortable and cosmetically appealing. High-index lenses can also be

used to improve

NEW LENSES, OLD FRAMES In fact, using an old frame for new lenses is an odds-on favorite for eventual trouble. Even if the old frames have an up-to-date appearance, they will age faster and look ever more out of date during the life of their new lenses. If the old frames are discontinued, the patient needs to realize that if they break, their new lenses may not

fit

WHAT SPORTS EYEWEAR CAN TELL YOU The Kentucky Derby is one of my favorite spring events. It’s fun to learn how some of the horses got their unusual names and to hear the jockeys’ stories. The extravagant ladies’ hats and the pageantry add to the anticipation of what’s been called “the most exciting two minutes in sports,” when twenty horses thunder around a mile and

a quarter track.

CONTINUING EDUCATION In the February issue of 20/20 Magazine, Maryann Santos wrote a terrific Continuing Education course, “The State of Opticianry.” It shed light on the different avenues available to individuals from each state for licensure or certification and highlighted many organizations and state societies that need our voices and participation to help elevate the trajectory of the professional

optician.

IT'S AS EASY AS A, B, DBL Hold the ruler over the frame front and sight an imaginary line from the farthest edge of a box touching the left temporal lens edge of the right eye to the right edge of the box. That's the A dimension. Next, measure the DBL or "bridge" size. Lastly, turn the ruler and measure the "B" or vertical size of the lens. DIGITAL LENS BASICS: WHAT YOU NEED TO KNOW THE LENSES. When lenses are tilted and turned, their optical power changes. The lens designer must cause the digital lathe to generate curvatures that yield the prescription shown by the test lenses, although the eyewear lenses are tilted and turned. In other words, the lenses “as worn” must give the power “as the patient tested.”. DESIGN OF ISEIKONIC LENSES, PART TWO Design of Iseikonic Lenses, Part Two. Plus lenses will create magnification which in turn creates a larger than normal retinal image. Minus lenses create minification (negative magnification) which will create a smaller than normal retinal image. Magnification due to the vertex power and vertex distance of a lens is called the POWER

FACTOR.

EYEWEAR AND TRENDS

The Art of Children’s Eyewear. The importance of children’s eye health cannot be underestimated. As eye care professionals, we must promote this in our everyday practices. It is imperative to educate parents to provide their children with comprehensive eye examinations

at an

LESSON: - 20/20 MAG

Free-form surfacing, also referred to as direct or digital surfacing, refers to a process that is capable of producing complex surface shapes, including aspheric, atoric and even progressive addition surfaces. A typical process begins by generating the lens surface using a three-axis, computer numerically controlled (or CNC)

generator.

TIPS FOR USING VARIABLE CORRIDOR PAL’S If you’ve looked at the newest releases in Progressive Lens Designs, you will notice that you have approximately one bazillion choices when it comes to choosing the corridor length in your favorite Progressive Lens. If you’re not 100% certain on how to make the best choice for your patient regarding corridor length, here are a few tips to help clear the sometimes muddy water. UNDERSTANDING PRISM DESIGNS FOR HOMONYMOUS HEMIANOPSIA We will elaborate on the tradeoffs induced in HH lens designs due to prismatic effects such as apical scotoma, confusion and diplopia. We will demonstrate the advantages of peripheral prisms and their potential benefits for both mobility and driving. Homonymous hemianopsia is a debilitating condition related to brain injury that

often cooccurs

POWER AT ANY MERIDIAN Added to the sphere power the result is -2.00 and -1.00 or -3.00 along the 180. It’s also logical; see the illustration of the two power meridians. A -3.00 is halfway in power and halfway in distance between the two principal meridians. Use this to estimate the power POLISHED LENS EDGES, FRIEND OR FOE? PROS. A common school of thought is that if the edge of the lens will be exposed (as they would be with both semi-rimless and drilled rimless frames) you should choose to have those edges polished in order to enhance the aesthetic of the finished glasses. By polishing the edges of these lenses you help to create the "invisible" look of

lenses

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