VisionPlus India

For any unexpected journey A guarantee of HOYA lens coating quality and durability Droplet test - ease to clean and water resistance The lenses are wiped with paper up to 5,000 times, then water droplets are used to measure how much hydrophobic coating remains Sandpit test (HOYA Bayer value) - resistance to abrasion The lenses are placed in a ‘sandpit’ full of gravel and are shaken vigorously 800 times Steel wool test - resistance to harsh scratches Weighted carbon steel wool is brushed from side to side across the lens surface. Oven test - heat resistance Lenses are tested for resistance to temperatures over 95°c in a laboratory-graded oven Extreme weather test - resistance to weathering The lenses are exposed to cycles of ultraviolet light and moisture at elevated temperatures - just like the harsh equatorial climate. Scan for More details: