'Dài yǎnjìng' literally means 'to wear glasses' — it's a verb phrase composed of three characters: 戴 (dài) meaning 'to wear' (used for items placed on the head, face, or hands), 眼 (yǎn) meaning 'eye', and 镜 (jìng) meaning 'mirror' or 'lens'. Together, 眼镜 (yǎnjìng) is the noun 'glasses', and 戴眼镜 (dài yǎnjìng) describes the action of putting them on and wearing them. It's commonly used in health, daily routines, and appearance-related contexts.

This phrase emphasizes the ongoing state or habitual action of wearing corrective, protective, or decorative eyewear. Unlike English, Chinese doesn’t require an auxiliary verb like 'do' for questions or negatives — you simply say 他戴眼镜吗？(Does he wear glasses?) or 她不戴眼镜 (She doesn’t wear glasses). It’s not used for temporary placement (e.g., holding glasses up to your eyes); for that, other verbs like 拿 or 举 would be more appropriate.