Start with fit and protection—look for UV protection (UV400) that covers the eyes and pick a frame size that matches your face. Consider whether you need adult or kids sizing and choose a style that suits your daily use.

Lens quality and protection (UV400, polarization if glare is an issue), frame durability and material, and overall comfort (nose pads and temple grip).

Consider the activity and environment—sport or casual wear, need for glare reduction, and whether you prefer polarized lenses or lighter tints for everyday use.

Choose smaller, lighter frames and kid-friendly materials for children; for adults, ensure the frame fits your face and select lens performance and tint appropriate for your typical settings.