Lens Index
1.67 Index Lenses
A very thin, lightweight lens suited to moderate to strong prescriptions between ±4.00 and ±6.00. Anti-reflective (MAR) coating included as standard — with optional upgrades available at checkout.
MAR Coating Included
Single Vision & Varifocal
In-house Glazing
Why choose 1.67
A very thin lens for moderate to strong prescriptions
Suited to stronger prescriptions
Ideal for SPH and CYL values between ±4.00 and ±6.00 — significantly thinner than 1.50 or 1.60.
MAR coating as standard
Anti-reflective coating is included as standard — reducing glare from screens and oncoming headlights.
Noticeably thinner and lighter
A dramatic reduction in lens thickness for stronger prescriptions — makes a real difference to comfort and appearance.
All vision types available
Available in single vision, varifocal and bifocal — choose your lens type at checkout.
Understanding 1.67
What you need to know
What is a 1.67 index lens?
The index number refers to how efficiently a lens bends light. At 1.67, the same prescription is achieved in a significantly thinner and lighter material — a step up from both 1.50 and 1.60 that is clearly visible at the lens edge.
Who is it for?
1.67 is the recommended choice for prescriptions between ±4.00 and ±6.00. If you have been told you have a strong prescription, or if your current lenses look noticeably thick, 1.67 will make a substantial difference.
What prescription does it suit?
Best suited to SPH and CYL values between ±4.00 and ±6.00. Below ±4.00 the 1.60 is sufficient. Above ±6.00, the 1.74 will give the best possible result.
Thickness comparison
How does 1.67 compare?
At 1.67, the reduction in lens thickness compared to 1.50 or 1.60 is dramatic — particularly noticeable for prescriptions above ±4.00.
1.50
Standard ←
Up to ±2.00
1.60
Thin
±2.00 – ±4.00
1.67
Thinner
±4.00 – ±6.00
1.74
Ultra-thin
±6.00 and above
Prescription guide
Which index suits your prescription?
Use your SPH and CYL values from your prescription to find the right index. The coatings column shows what is included as standard at each level.
Lens index
Prescription range
Best for
Included coating
1.50
Up to ±2.00
Low prescriptions
Anti-scratch
1.60
±2.00 – ±4.00
Mild to moderate
Anti-reflective (MAR)
1.67 ←
±4.00 – ±6.00
Moderate to strong
Anti-reflective (MAR)
1.74
±6.00 and above
High prescriptions
Anti-reflective (MAR)
How to order
How to get 1.67 index lenses
1
Choose a frame
Browse our full range of frames from £10 and pick a style that suits you.
2
Select your lens type
Choose single vision, varifocal or bifocal at the lens selection step.
3
Select 1.67 index
Choose 1.67 at checkout. MAR coating is included — add blue light filter, transition or sunglass tint if needed.
Ready to order your prescription glasses?
All lenses are glazed in-house by our qualified technicians. Next-day delivery available on single vision orders placed before 3pm. Frames from £10.
Available with
1.67 index is available across all lens types
Single vision
For reading, distance or everyday use. The most common lens type.
Varifocal
Seamless correction at near, intermediate and far distances in one lens.
Bifocal
Two distinct zones for near and far vision, separated by a visible line.
FAQ
Frequently asked questions
Is 1.67 index the right lens for me?
If your prescription has SPH and CYL values between ±4.00 and ±6.00, 1.67 is the recommended choice. The reduction in thickness and weight compared to 1.50 or 1.60 is significant — making a real difference to both the appearance and comfort of your glasses.
What coatings come with the 1.67 index lenses?
Anti-reflective (MAR) coating is included as standard with all our 1.67 index lenses. You can add a blue light filter, a sunglass tint, or transition lenses as optional upgrades at checkout.
Can I get Varifocal or Bifocal lenses in 1.67 index?
Yes. 1.67 index is available in single vision, varifocal and bifocal. Select your lens type first, then choose 1.67 at the index selection step during checkout.
What is the difference between 1.67 and 1.74 index?
1.74 is thinner again and is best suited to prescriptions above ±6.00. For prescriptions between ±4.00 and ±6.00, 1.67 delivers an excellent result. Both include anti-reflective coating as standard.
