Lightweight and durable, 1.67 high-index lenses are prolific these days.
A high-index lens material is considered by the industry to be one with an index of refraction of 1.59 and up. The main benefit of high index lenses as compared to standard plastic lenses is that they have a thinner lens profile. 1.67 high index lens material has become very popular in the last number of years, in particular with rimless eyewear because it’s a material that holds up well.
SOMETHING FOR EVERYONE
Today lens manufacturers make 1.67 high-index lenses in a host of formats so just about any patient can reap the benefits of light weight, thin profile, and impact resistance. Patients choose a frame, the ECP dispenses a 1.67 lens, and, bingo, they walk away with a clear and comfortable pair of glasses.
Chances are the patients don’t know their lenses could have been any different but will remember the durability and comfort factors of these the next time they get new glasses.
“1.67 is a very durable lens material,” says Lynne Roberts, product marketing manager for Signet Armorlite, Inc., which is known for KODAK Unique progressive lenses and the Navigator‘ line. “That’s why a lot of doctors use it. It’s lightweight, it accommodates a thinner lens profile, and it drill-mounts well.” 1.67 lenses come in so many configurations that doctors generally assess other factors before prescribing a 1.67 lens, states Roberts. “We have eight different 1.67 offerings in just progressives alone,” she says, noting that this variety is common for lens manufacturers.
“1.67 lenses are especially apt choices for high-minus prescriptions,” explains Shirley Yin-Piazza, technical marketing manager for HOYA Vision Care, North America. “Some are even high-plus, going as much as +8.00D sometimes.” HOYA carries 1.67 in “pretty much every lens except trifocal,” including photochromic and polarized varieties. “People with more extreme prescriptions on the high-minus side use 1.67 lenses,” adds Yin-Piazza. “Sometimes you can go with basic plastic, but plastic can’t even get you to your high minuses for the very nearsighted. For patients like those, you’ll need a more premium material like the 1.67.”
At PFO Global, the Optima line includes high-index lenses made in Japan, including a 1.67 in semi-finished and finished, says president and CEO, Rudolf Suter. PFO Global stocks lenses up to cylinder 4.00D.
Some products that fall under the 1.67 spectrum include Essilor of America, Inc.’s Accolade‘ and Ovation‘, HOYA’s Amplitude and Hoyalux Array, Nikon Optical USA’s DigiLife (see “Modern Lifestyle, Modern Lens“) and SeeMax Power; Seiko Optical Products of America, Inc.’s PolarThin 1.67 (see “Seiko Slims Down in the Sun“), Supernal, and Surmount; Shamir Insight, Inc.’s three products in its Attitude III and Autograph‘ III line; Transitions Optical Inc.’s Transitions‘ Signature™ VII and XTRActive‘ lenses; and Carl Zeiss Vision Inc.’s ZEISS Progressive GT2 3D and SOLAOne HD.
As technological advances continue, we may see even more variations of 1.67 high-index lenses come on the market.
Rona Gindin writes about business and lifestyle trends from Orlando, FL.
|WHERE TO FIND IT:
|Carl Zeiss Vision Inc.
|Essilor of America, Inc.
|HOYA Vision Care, North America
|Nikon Optical USA, Inc.
|Seiko Optical Products of America, Inc.
|Shamir Insight, Inc.
|Signet Armorlite, Inc.
|Transitions Optical, Inc.
|X-Cel Optical Co.