Siemens knows this and developed the Aquaris hearing aid, the only one to receive an IP68 rating for continuous submersion underwater (to three feet).

ENGADGET: Siemens' waterproof Aquaris hearing aid means rain doesn't need to stop play, we go ears on

Possible features include a binocular heads up display, corrective lenses, a hearing aid app, color blindness correction, even an app to aid those with macular eye disease.

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It is an FDA-approved hearing aid, but it is sold online and preprogrammed for typical mild to moderate hearing loss.

WSJ: Testing, Testing...Can You Hear Better Now?