Figure 5.

Concentric array design. Left: A flat array before implantation shows gaps between the two arms and the arms and the central part. Right: following the implantation the arms move towards each other and the central part to close the gaps and the array conforms to the curvature of the eye. The gaps can be calculated using the above equations. The equation for G₂ is the same as that of G1, except that D₂ replaces D. The desired final gap after tacking can be added to the calculations. D′ is the diameter of the electrode array before conformation, and equals D plus G₃. D and D₂ are the diameters of the electrode array and the inner circle following conformation, respectively. r: radius of curvature of the eye.