Decide if you need everyday glasses or sunglasses, and think about where you’ll wear them most and the lighting conditions. This helps narrow lens options and frame sizes early.

Key attributes are lens protection and type (UV and polarization if offered), frame size and shape for a comfortable fit, and the material and finish for durability.

Secondary factors include your activity (commuting, cycling, or motorcycling), preferred coatings (scratch resistance, anti-reflective), and whether you want a lightweight or more robust frame.

For driving, choose lenses with glare reduction and a neutral tint that preserves color perception; for riding, look for a wraparound fit and sturdy construction to stay secure at speed.