Mineral Glass is created from natural elements like sand and soda ash. It’s endlessly recyclable and harmless to humans and animals alike. It’s high resistance to scratching and lack of distortion make it the world’s best lens material. It really does have to be Mineral Glass.
100% UVA/UVB Protection
All OTIS fixed-tint lenses block 100% of harmful UVA, UVB and HEV light to provide superior protection from solar damage causing intraocular melanoma and macular degeneration, as well as reducing eye fatigue and reducing the visible signs of aging, while maintaining true color and depth perception.
8 BASE LENS CURVE
Lens 'Base Curve' is a measure of the front curvature of the lens. The higher the number, the greater the curve.
Sizing: 59 - 18 - 128 (mm). For more sizing information see our Frame Dimension Guide.
TR90 GRILAMID FRAME
Portside is made from injection moulded Swiss Grilamid. Swiss TR90 Grilamid is an extremely light, extremely tough, shape-retaining and highly durable polymer ideal for the manufacture of lightweight eyewear. Formulated as synthetic titanium, TR90 Grilamid's outstanding properties include excellent flexural fatigue strength, high resistance to chemicals and fracturing and excellent weathering and UV resistance. Swiss TR90 Grilamid is the highest quality and lightest engineering plastic in existence.
VISSOTTICA HINGES WITH STAINLESS STEEL SCREWS
OTIS frames are produced with high quality 3, 5 and 7 barrel hinges. These premium grade Vissottica brand hinges are extremely durable and boast 100% corrosion resistance.