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Sunglasses block sunlight and protect our eyes.
People mostly wear sunglasses outside where sunlight is present, and hang them on the collar of the T-shirts or keep in the pockets indoors. Sometimes, people drop their precious sunglasses they hung on the collar of the t-shirts unconsciously when leaning their body to pick something up from the ground.
To supplement the drawback of dropping sunglasses, magnets are added on the frames of the sunglasses so that magnets will stick to each other when sunglasses are hung on the collar. And, problems are solved!
shan dong university