Sunglasses Lenses

Lens Materials

Carbolite™ polymer lenses have 3-times the impact resistance of glass while weighing less than half the weight. When impacts are possible or unavoidable, this material is what you want to provide perception while protecting your eyes. Provides 100% protection from harmful UVA, B and C radiation. Created by a linking of polymers and carbonates, Carbolite™ is virtually indestructible. This is also the logical choice for any impact sport.

ResinLite™ lenses are made of CR-39. This is the world’s most widely used ophthalmic material. It’s lightweight and Rx suitability makes it the perfect choice for Haber’s Bi-focal products. Provides 100% attenuation of harmful UVA, B and C radiation.

Lens base curvature:

Most plano(non-corrective)sunglass lenses are spherical in shape meaning the lens is the same curvature in all meridians. In optics, lens base curve is measured with a tool called a lens clock on the outside surface of the lens. A flat surface would be shown as zero. A lens clock is a mechanical dial caliper that is used to measure dioptric power of a lens. It is a specialized version of a spherometer. The greater the numeric value, the greater the curvature of the lens. In corrective optics the curvature between the inside and outside lens surfaces would be different and a calculation would determine the power of the lens. For sunglasses the curvatures are roughly the same inside and out and no power is introduced into the lens.

Coatings:

X-Sheet hydro coatings are applied to sunglass lenses to keep water from sticking to them. The coatings are applied by a dip process and then hung to dry. At a microscopic level they even out the high and low spots in the lens and create one smooth, contiguous surface free of the irregularities common to both glass and polymer lenses.

By reducing the irregularities that water droplets attach themselves to, you can increase the bead angle of the water thereby reducing the wetted surface of each droplet. Gravity, wind, and vibration can all move the droplets from the surface of the lens which is what you want.

Hydro coatings work best on clean lenses as dirt, fingerprints, etc. all reduce the effectiveness of the coating by allowing water a place to get a grip.

Tri-Oxide mirror coatings are multiple layers of metallic oxide coatings that selectively filter light. This allows us to use lighter density lens colors while still allowing squint free vision.