[gibolt]

Hearing and vision are both very sensitive senses, that are easy to permanently damage.

Everyone should have access to treatment they need, but having a licensed doctor review severe cases to find the right fit and prevent further degradation or full deafness, especially if their hearing is already weak, is a reasonable safeguard.

[concordDance]

You can use an app to check which frequencies are missing. The man with the bit of paper will be doing the same thing.

I may be biased as I work on a medical device and at least for the device I work on the doctors signing off are contributing nothing more than their license.

[Maken]

Where are you getting your clinical data then?