01
1.56
STANDARD INDEX
A practical choice for everyday prescriptions.
A standard index option for everyday prescription requirements where extreme lens thinness is not the primary consideration.
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LENS GUIDE
What Are High-Index Lenses?
1.56 vs 1.60 vs 1.67 vs 1.74
Higher index lenses allow the required prescription power to be achieved with a thinner lens design. But which index is right for you?
01
UNDERSTANDING LENS INDEX
The right lens index can make a visible difference.
Choosing prescription lenses is about more than finding the correct power. The lens index can also influence the thickness and overall appearance of your finished lenses.
UNDERSTANDING LENS INDEX
What does lens index mean?
Lens index describes how efficiently a lens material bends light. A higher index can allow the required prescription power to be achieved with less lens material.
THE PRINCIPLE
Higher index.
Thinner design.
Thinner design.
01
Why does index matter?
When prescription power increases, lens thickness can become an important consideration. Higher-index options can help achieve the required optical power with a thinner lens profile.
The ideal choice depends on your prescription, frame selection and individual visual requirements.
FIND YOUR FIT
Four index options.
One right choice.
The ideal lens index depends on your prescription, frame and personal requirements. Explore the differences between the available Osten index options.
02
1.60
HIGH INDEX
A thinner approach to everyday vision.
A higher-index option to consider when a thinner lens profile is more important for your prescription and frame choice.
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03
1.67
HIGH INDEX
Designed for stronger prescriptions.
A higher-index solution that can help achieve the required optical power with a thinner lens profile.
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04
1.74
SUPER HIGH INDEX
Maximum index. Refined lens design.
The highest index option in the Osten range, intended for prescriptions where lens thickness and appearance are important considerations.
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OSTEN NOTE
The highest index is not automatically the best choice. Your prescription, frame and individual requirements should always guide the final selection.
THE DIFFERENCE
Less material.
A refined profile.
One of the key reasons to consider a higher-index lens is the potential for a thinner lens profile, particularly when prescription strength increases.
CONVENTIONAL PROFILE
PROFILE
More lens material may be required to achieve the same optical power.
VS
HIGHER-INDEX PROFILE
PROFILE
A higher index can achieve the required prescription with less lens material.
WHY IT MATTERS
A thinner profile can contribute to a more refined appearance, depending on your prescription and frame.
FREQUENTLY ASKED
Questions, answered.
A few things worth knowing before choosing your next pair of prescription lenses.
OSTEN
LENS KNOWLEDGE
High-index lenses use lens materials that can achieve the required prescription power with less material. This can help create a thinner lens profile, particularly for stronger prescriptions.
Not necessarily. The most suitable lens index depends on your prescription, frame selection and individual visual requirements. The highest index is not automatically the right choice for everyone.
Your prescription and chosen frame should be considered together when selecting an index. An optical professional can recommend the most appropriate option for your needs.
A higher index can allow the required optical power to be achieved with less lens material, which can contribute to a thinner lens profile.
Yes. Frame size and shape can influence the final appearance of a prescription lens. Lens index and frame selection are therefore best considered together.
Depending on your requirements, lens features can include UV protection, scratch resistance, water repellency, lightweight comfort and easy-clean properties.