This web page/app can use phone camera and microphone as a visual aid or hearing aid.
you can use it as a telescope;
you can use it as a magnifying/reading glasses;
you can use it to watch video/navigation while doing other activity;(you may feel dizzzzzzzzzzzzzzzzzzy.)
you can use it as a hearing aid;
you can use it as ...
All you need is your smartphone, a 3d goggle and a earphone.(may be a powerbank)
Example of navigation:
Example of watch video:
Try it here: (https://leoncoolmoon.github.io/cameraEye/)
Or scan QR code: