Mineral Lenses – Flat and Curved

STERNKREUZ mineral lenses are chemically hardened, making them particularly break-resistant. This property is not visible from the outside, but plays a decisive role in ensuring safe and smooth processing.

Precisely controlled ion exchange during manufacture creates high internal tension in the glass. This allows the lenses to absorb strong impacts and significant bending without breaking.

Therefore, always look for the STERNKREUZ trademark. MADE IN GERMANY