Start with sun protection and fit: ensure UV protection and pick a frame size that suits your face for comfortable all-day wear.

Prioritize lens quality (UV protection), polarization vs. non-polarized, lens tint and gradient, frame material, and overall fit around the ears and nose.

For driving, prefer polarized lenses for glare reduction; for outdoor activities, choose durable, secure-fit frames; for kids, select smaller, lightweight frames with sturdy hinges.

Narrow by polarization and tint first, then assess fit and comfort, and finally compare price or warranty to make the clearest choice.