Guides & Articles

How much sunglasses weigh, what sets the number, and why the size of the nose pads matters as much as the grams – with the figures optician sources actually give.

What beta-titanium is, why its crystal structure makes it springier than pure titanium, and what that means for a frame you wear every day – checked against optician training articles and materials research.

Discover lens categories, VLT transmission, and tint colors. Learn how to choose the perfect lens tint for your environment and lifestyle.

Darker lenses don't block more UV. UV protection comes from a filter in the lens material, so a light tint can block 100% of UVA and UVB while a dark one blocks none.

Master frame geometry with our comprehensive guide to face shapes and eyewear anatomy. Learn how to choose sunglasses that balance your features using architectural principles.

Beta-titanium compared with pure titanium, acetate, stainless steel, aluminium and polyamide: weight, skin contact, ageing, adjustment and repair, checked against optician training literature and dermatology studies.

How the ZEISS lenses in our frames are built: a back-surface anti-reflective coating, DuraVision hard coating and UV400 protection, and the 180 years of optics behind them.