The chip (100) comprises an upper rigid material (10) and a lower rigid material (20), a channel (30) provided between the upper rigid material (10) and the lower rigid material (20).

At least a part of the rigid material is situated radially between the flexible material and the stiffening insert.

The material of at least one of the sandwich layers is a rigid material.

Then, the rigid plastic material is injected at gates located where the rigid material is desired.

For instance, the first material may be a stiff material and the second material may be a compliant material.

The slotted spray nozzle (40) can be made of a rigid material or an elastomeric material.

The second plate is constructed of a rigid material.

In other instances, the first material may be a compliant material and the second material may be a stiff material.

A short tube extends from the enclosure for communication with the ear canal, the short tube being made from a rigid or semi-rigid material and including a flexible cuff disposed over the tube made from a resilient material.

This additional layer of rigid material may also be in the form of rigid foam.

The outer enclosure (14) is preferably made from a rigid or semi-rigid microwave transparent material.

The mould wall (1) may be made of light transmissible rigid to semi rigid material.

Such an implantable capsular tension ring is prepared by chemical modification either of the segments of the annular body made of rigid material, from a flexible material, or the joints made of rigid material from a flexible material.

The displacement rod is constructed of rigid material.

The tongue is preferably formed of a rigid material.