Table 1 Values of eccentricity (e) and distance between the focus and the directrix (m)
Types of electrode configurations | Parameters of the electrode array | |
|---|---|---|
e | m (mm) | |
Configuration I (circle) | 0 | - |
Configuration II (ellipse) | 0.6 | 7 |
Configuration II-1 (ellipse) | 0.45 | 7 |
Configuration III (parabola) | 1 | 7 |
Configuration IV (hyperbola) | 2 | 7 |
Configuration IV-1 (hyperbola) | 3 | 7 |