Although an IIC hearing aid is incredibly discreet, there are few points that should be considered in order to find out if they are right for you or not. First of all, it is not suitable for everyone. According to experts it is only recommended for mild to moderate hearing losses. That is because it is not strong enough for profound or severe hearing losses (that may change soon).
As mentioned before, this type of hearing aid fits deep in the ear canal. This means that the IIC hearing aid sits very close to the ear drum. So, how well and how deep this hearing aid fits, and how invisible it is, will mostly depend on your ear's anatomy and the quality of the ear impression taken by the hearing provider. As you can see, while it is considered 100% invisible, its proper fit depends on few factors such as if your ear canals have the right curvature to both retains the device in your ear as well to allow it to fit deep enough, making it 100% invisible.
So as you can see, it is very important that the device sits deep in your ear canal to ensure a deep fit. If the IIC hearing aid is an option for you, your hearing provider will then take a very deep ear impression. Some find this an uncomfortable experience, but overall it is not too bad.
Overall, it is important that you understand that the IIC hearing aids are not a good fit for everyone who wants them. If after consulting with your hearing provide you find out that the IIC is not an option for you, don't worry! You will be surprised by how many other discreet options you have. Currently, only few manufactures produce IIC hearing aids. Your hearing provider will recommend the best one for you.