Start with fit and comfort—check frame width, temple length, and nose bridge. Then confirm basic protection and lens quality: look for reliable UV protection and sturdy lenses.

Key factors are UV protection, lens type (polarized or not), lens tint, frame material, and overall fit for your face.

Polarized lenses reduce glare from roads and water, which helps in bright conditions; coatings can add scratch resistance or mirror finishes but may affect cost and weight.

For driving, prioritize glare reduction with polarized lenses; for beach or water activities, emphasize glare control and color neutrality; for everyday city wear, choose a comfortable, durable frame with reliable UV protection.