Frequently Asked Questions

WHAT KIND OF PROTECTION DO KOH LENSES OFFER?

KOH lenses are 100% UV400 CE protected and are made of Polycarbonate or TAC.

These lenses have several outstanding features:

POLYCARBONATE:

RESISTANCE: Polycarbonate is a very impact-resistant material, making it ideal for sports glasses. They are harder to break compared to glass or regular plastic lenses, making them more durable and safer.
LIGHTWEIGHT: Polycarbonate lenses are considerably lighter than glass lenses, making them more comfortable to wear for extended periods. This is especially beneficial for those who wear sunglasses all day.
UV400 PROTECTION: Sunglasses with UV400 protection block between 99% and 100% of ultraviolet light. They filter and block light rays with wavelengths up to 400 nanometers, including UVA and UVB rays.

TAC:

TAC (Triacetate Cellulose) lenses are known for several distinctive features that make them popular in sunglasses and other types of eyewear. Their main characteristics are described below:

UV Protection: TAC lenses offer effective protection against ultraviolet (UV) rays, blocking up to 100% of UVA and UVB rays, which is essential to protect the eyes from sun damage.
Polarization: One of the most outstanding features of TAC lenses is their polarization capability. These lenses reduce glare reflected on surfaces such as water, snow, and roads, improving visual clarity and comfort.
Lightweight: TAC lenses are lightweight, which contributes to comfort when wearing glasses for extended periods.
Scratch resistance: These lenses are scratch-resistant, which increases their durability and maintains clear vision for longer.
Optical clarity: TAC lenses offer excellent optical clarity, providing sharp and precise vision without distortions.
Impact resistance: Although not as resistant as polycarbonate lenses, TAC lenses still offer good impact resistance, protecting the eyes from possible injuries.
Thermal stability: TAC lenses have good thermal stability, which means they do not deform or change color when exposed to high temperatures.
Multiple layers: TAC lenses are usually composed of multiple layers that include a polarizing layer, UV protection layers, anti-scratch layers, and layers to improve durability and clarity.
Anti-reflective: Some TAC lenses come with an additional anti-reflective coating that helps reduce glare and internal reflections.

Regarding KOH lenses, some of them are also polarized and/or have a Revo filter:

POLARIZED LENSES: Polarized lenses are designed to reduce glare caused by light reflected on flat surfaces, such as water, snow, or roads. These lenses have a special filter that blocks polarized light at certain angles, which improves visual clarity and reduces eye strain.
REVO: The Revo filter is a multi-layered coating based on NASA technology applied to lenses to improve vision clarity and contrast. This coating reduces reflections and improves color perception, providing a sharper and more vivid visual experience.

In summary, polycarbonate lenses are durable, lightweight, and offer UV400 protection. KOH lenses may have additional features, such as being polarized to reduce glare and having a Revo filter to improve visual clarity and contrast. These additional features can provide a more comfortable and higher quality visual experience.