– Advertisement for a miniature hearing aid
If this is your first time reading about a contact lens for the ear, you might wonder how a device to improve hearing can be like a device to improve eyesight. Hearing and seeing are both sensory experiences but not at all alike. Seeing a cello is not the same as hearing one.
So this is a comparison that, rather than explaining, works by demanding an explanation. Certain jokes use the same trick – for example, Ben Franklin’s assertion that houseguests are like fish. (They begin to smell after three days.) Metaphors are usually meant to clarify but sometimes they mystify on purpose – so the audience will be curious and pay close attention.
Lyric hearing aids – much smaller than conventional hearing aids – are implanted inside the ear, so they are invisible to the public, like contact lenses. People judge you to be younger and more attractive.when you are not wearing bulky apparatuses, such as bifocal glasses or boxy earplugs.
Metaphor is a contact lens for your mind.