The present invention refers to medical devices comprising a modified polyamide or to modified polyamides or modified polyamide elastomers with the polyamides having high flexibility and high stress resistance, especially tensile strength or tear resistance, in addition to the good physical characteristics of the known polyamide elastomers. The compression is adaptive based on one or more criteria related to the system, including but not limited to: the centralized authority, one or more remote devices, the communication channel, andor the data communicated. This high-quality film is, if being prescribed by a refractive index, a film whose refractive index with respect to a wavelength of 633 nm is approximately 1.