Oakley Sutro Grey Ink Sunglasses. The Oakley Sutro Grey Ink Sunglasses revolutionize the look of traditional sports eyewear. Inspired by the everyday life of urban cyclists, the close-fitting glass creates a distinctive and versatile look and protects against wind and weather. The Prizm™ lens technology ensures improved vision and, thus, ensures that active athletes get through the day fully motivated and safely.Prizm™ lensesPrizm™ is a revolution in lens optics built on decades of colour science research. Prizm ™ lenses offer unprecedented control over light transmission, allowing colours to be fine-tuned to maximize contrast and improve visibility.