Start with the purpose and fit: decide if you want sunglasses or optical glasses, and check whether the frame size suits your face.

Look at frame material and build, lens quality and protection, and how the size (lens width, bridge, temple length) matches your facial features and comfort.

Think about where you’ll wear them (daily wear, driving, outdoor activities) and whether you prefer features like polarized or gradient lenses.

Check which options support prescription lenses and ask about compatibility and any lens upgrades before buying.