Lens Thickness

What determines the thickness?

Thickness is not a fixed value: it varies according to various technical factors that determine the lens’s aesthetic and functional performance.

• The power of the lens — Positive lenses are thicker in the centre, whilst negative lenses are thicker at the edges.
• Refractive index — High-index materials allow for thinner lenses.
• Lens diameter — A larger diameter increases the peripheral thickness.
• Lens geometry — Aspheric and free-form designs reduce the perceived thickness.
• Choice of frame — Larger or off-centre shapes require more material.

Why it is important

• Aesthetics — A thinner lens looks more harmonious in the frame.
• Comfort — Less weight means greater comfort in everyday use.
• Stability — The thickness affects the lens’s strength.
• Visual quality — Proper design reduces distortions and aberrations.

Solutions for reducing thickness

At Isolani Optical Centres, we use technologies and materials that enable us to produce thinner, more comfortable lenses.

• High-refractive-index materials — For thinner lenses with the same prescription.
• Free-form design — Customised surface optimisation.
• Thin lenses — Dedicated solutions for high power applications.
• Choosing a frame — Shapes and sizes that bring out the best in the lens.

Isolani Experience

Each lens is designed with the frame, technical specifications and lifestyle in mind, to achieve the ideal balance between aesthetics, comfort and visual quality.

• Bespoke glasses — Full customisation of the frame and choice of lenses.
• Behavioural Centring — Real-world operating parameters for precise design.
• Simulation Room — Aesthetic and functional checks prior to production.

Ongoing support

The Lens Thickness affects the appearance, comfort and stability of the frames. At Isolani Optical Centres, we offer ongoing support with adjustments, non-medical checks and updates to your optical solutions whenever necessary, to ensure you maintain the best possible vision over time.

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The information on this page is provided for information purposes only and relates to the optical and commercial sectors. It does not contain any medical, clinical or diagnostic information.