Glass lenses
Relatively thick, heavy glass lenses deliver high-level optical clarity. They are also resistant to scratches. However, glass lenses can quickly be shattered or chipped. Besides, these lenses require an extra coating to reach the 100% UV protection threshold.
High-index plastic lenses
These high-tech lenses are very lightweight and will be thinner than comparable glass lenses. Most high-index lenses have 100% UV protection built in. Because the lens material is relatively soft and very reflective, these lenses require scratch-resistant and anti-reflective coatings.
Polycarbonate lenses
Highly impact-resistant polycarbonate lenses are 100% UV protective, and they’re lighter and thinner than every other lens type. However, polycarbonate lenses need a scratch-resistant coating in addition to a coating that decreases the lenses’ reflective characteristics.
Polarized lenses
By minimizing light reflection and glare, polarized sunglasses make colors appear brighter and more saturated. They can also make it easier to see objects below the surface of a lake or stream.
The optometric lab can easily add polarization to the lens during the fabrication process. Note that polarized sunglasses can interfere with viewing LCD screens like those on many car instrument panels and smartphones. They are also not recommended when you are navigating on icy roads.
