BAT EYES

The glasses are a metaphor for both sight and insight. She has glasses, and she can see the meaning in the poem. He doesn’t take the poem seriously or understand it, so he makes fun of her. The boy, years later as an older man, is getting his eyes tested, which brings back the memory of his first love. At this point, he has finally understood the poem - that of loving someone and losing them, which is what Yeats was writing about in the poem.