Tus Gafas Oscuras by Shakira is a song about emotional distance and hidden pain. Shakira uses the metaphor of 'dark glasses' to describe someone who hides their true feelings and emotions behind a facade. The key themes include emotional concealment, personal suffering, and the difficulty of understanding someone else's internal struggles. Notable moments in the song include lines where Shakira describes seeing reflection in the dark glasses, symbolizing a moment of attempted connection despite the barriers.