GUNNAR Optiks Sparrow Digital Performance Eyewear - Onyx/Red Amber Tint- Specially formulated tint conditions and shifts the color spectrum to provide superior contrast, detail and resolution. Ergonomic Fit- Lightweight frame and adjustable nose pads for comfort and style Improves Focus- Helps your eyes focus more naturally protecting against fatigue Sharpens Detail- Enhances detail for sharper, clearer vision Reduces glare and improves visual focus