Tokai
Single vision 1.70 and 1.76
When the prescription reaches a range of +/- 4.00D and more, Tokai says its single vision lenses provide optimal options for patients in both unique 1.70 and 1.76 indices, ensuring the best optical and aesthetic outcomes.
By considering the frame fitting and prescription information, the lenses can be crafted in various designs, including aspheric, bi-aspheric and bi-convex, as well as bespoke bi-aspheric lens technology to produce the finest results.
The company notes its Lutina and Lutina photochromic, both offering 100% UV & 94% HEV absorption, are available in 1.76 material, which is an index that can be tinted up to 85% absorption.
These unique 1.70 and 1.76 indices are also available in a range of progressive, indoor/office and enhanced single vision lenses. Tokai says that this a broad offering of high index lenses that can help independent opticians stand out in the crowd.
Essilor
Lineis 1.74
Lineis 1.74 from Essilor is said to be a high-performance, high-index, ophthalmic lens for patients with strong prescriptions. Made from a lightweight ultra high index (UHI) organic material, the lens is up to 50% thinner than a standard CR39 lens, up to three times lighter than a mineral lens and for myopes, up to 10 times flatter than a mineral UHI lens.
Alan Pitcher, commercial director for wholesale lenses at Essilor UK, said: ‘The slim aesthetic of the lens makes it a perfect choice for eye care professionals to recommend to patients with higher prescriptions. The Lineis 1.74 lens is our flattest lens available so ideal if a patient wants to avoid wearing thick heavy lenses. The lens is also compatible with all frame types, even rimless.’
The lens is available across the company’s premium Varilux designs and single vision designs including Essilor Eyezen, with full and graduated Xperio tints available.
DSW Optical
1.67 index
DSW Optical says it is often asked to provide lenses for complex prescriptions and, when choosing a lens, the lab takes into consideration many factors. However, the lab notes that one factor remains constant; to provide a lighter, thinner lens, higher indexes are required.
According to DSW, one of the best options is often 1.67 index, as it can be around 35% thinner and lighter than CR39. It also offers a flatter profile, as the base curve used can be lower.
DSW says its product range spans non-aspheric, aspheric, individualised lenses, photochromic, tintable and polarised. This range is said to offer a wide range of dispensing options, while also adding value for money, even in lower prescriptions.
With a relatively modest -3.00sph, DSW says it can be the difference between a lens sitting flush into a frame and protruding out but, when given a -12.00sph, it can be the difference between a patient getting the frame they have chosen or being asked to compromise.
Younger Optics
1.67 Index Drivewear
Younger Optics says Younger Transitions 1.67 Index Drivewear lenses are groundbreaking and redefine enhanced vision for the modern consumer.
Said to be crafted with precision and cutting-edge technology, the lenses adapt to changing light conditions, providing wearers with clarity and UV protection.
Designed for those on the move, the Younger Transitions 1.67 Index Drivewear lenses are said to offer a superior visual experience, enhancing contrast and reducing glare during daytime and driving scenarios.
Younger says DriveWear lenses are versatile, offering patients optimal visual acuity and style in one.
Optimum RX Group
Blended lenticular lenses
Optimum RX Group says it has a large range of lens materials for high prescription and complex lens offerings enabling them to produce the most challenging of prescriptions in single vision, bifocal and progressive designs.
The company says this is not only in a clear lens option but also in optiChromic, Transitions and polarised choices giving eye care professionals a much wider offering to their patients.
According to Optimum, its blended lenticular lenses are a suitable solution for high myopia prescriptions as they offer some advantages in comparison to non-lenticular lenses.
These advantages include thinner edge thickness and therefore less weight for the same prescription, and wider manufacturing prescription range for a blank with the same frontal curvature.
Optimum also notes that large field lenticularisation can be used to achieve a reduction of up to 25% less edge thickness in negative
prescriptions.
Eye Index
HD Freeform lens
Specialist prescription lab, Eye Index says it has a well-established focus on complex and stronger prescriptions.
Calling on 40 years of ophthalmic lens experience, the company is well-placed to provide useful guidance on the best and most comfortable high index options for the patient.
The HD Freeform lens material used by the company offers a full range of high index choices, but Eye Index notes the ultimate test is to get the right balance of lens thickness, weight and cosmetic appearance.
According to Eye Index, there can be a temptation to go for the highest index to meet stronger prescription requirements but other materials can produce better results.
The lab gives an example, saying 1.53 index Trivex can be thin and the lightest and most comfortable option.
For those high index patients unable to get on with varifocals, the company will recommend a digital bifocal alternative, which still offers all transition and polarised options in high index materials.