High-Index Lenses

Key features

The refractive index indicates the extent to which a material can bend light. The higher the index, the thinner the lens can be whilst maintaining the same dioptric power. High-Index Lenses are therefore an aesthetic and functional solution for those with high prescriptions.

Common refractive index values

• 1.60 — Moderate reduction in thickness.
• 1.67 — A significantly thinner lens.
• 1.74 — The thinnest organic material available.

Benefits of High-Index Lenses

• Thin — Ideal for short-sightedness and severe long-sightedness.
• Lower weight — Greater comfort in everyday use.
• Improved aesthetics — Lenses that protrude less and blend in more harmoniously with the frame.
• Greater transparency — Modern materials with excellent visual appeal.

When are they recommended?

• High-level powers — Severe short-sightedness or long-sightedness.
• Slim frames — Minimalist or slim-framed glasses.
• Aesthetic requirements — For those who want less noticeable lenses.
• Large-diameter lenses — For wide or unusual frames.

Relationship with other technical parameters

High-Index Lenses require appropriate geometries and treatments to ensure the best visual quality.

• Aspheric lenses — They improve visual quality in materials with a high refractive index.
• Anti-reflective coating — Essential for reducing reflections from high-refractive-index materials.
• Optical aberrations — Advanced geometries help to minimise them.

Optical solutions

High-Index Lenses are available in a range of configurations and can be fitted into various styles of glasses.

• Single-vision lenses — For clear vision at a specific distance.
• Progressive lenses — Comfort over all distances, with a slim profile.
• Office lenses — Also available in high-index materials.

Isolani Experience

At Isolani Optical Centres, we select high-index materials based on the lens power, the frame and aesthetic requirements, ensuring an optimal balance between visual quality, comfort and design.

• Personalised vision consultation — Choosing the ideal material.
• Behavioural Centring — Optimisation of actual yield.
• Simulation Room — Aesthetic and functional assessment of the lenses.

Ongoing support

High-Index Lenses require precise centring and appropriate aftercare. At Isolani Optical Centres, we offer ongoing support to ensure they continue to perform well and remain comfortable over time.

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