Because they're rimless, they don't feel out of place. They cut blue light from computers, etc. They have UV400 protection, so they're gentle on the eyes. When you go outside, the lenses become a soft, darker color. They might be a little helpful during allergy season. I want to feel better. Great for walking, driving, strolling, camping, hiking, the zoo, picking up and dropping off children, children's field trips, sports days. Easy to use. They don't have prescription lenses, so you can use them casually. They change your look. Why not take them with you when you go out? Lens: Width 5.5cm Height 3.5cm Glasses width: Approximately 14.5cm - Color: Silver - Frame Material: Metal - Lens Type: Clear Lenses - Style: Fashion / Non-prescription glasses