Adaptive tuning of a contact lens

A system comprising:

• a contact lens comprising a resonant circuit, the resonant circuit including:
• a first conductive coil to receive energy from an external source via inductive coupling;
• and
• a capacitive circuit coupled in parallel to the first conductive coil, the capacitive circuit having a capacitance that is adjustable to control a resonant frequency of the resonant circuit of the contact lens, wherein the capacitive circuit includes:
• a first node,
• a second node,
• a first capacitor connected between the first node and the second node, and
• a switched capacitor network or variable capacitor connected between the first node and the second node, wherein the capacitance of the capacitive circuit corresponds to a combined capacitance of at least the first capacitor, and the switched capacitor network or the variable capacitor.

A system comprising:

• a contact lens comprising a resonant circuit, the resonant circuit including:
• a first conductive coil to receive energy from an external source via inductive coupling;
• and a capacitive circuit coupled in parallel to the first conductive coil, the capacitive circuit having a capacitance that is adjustable to control a resonant frequency of the resonant circuit of the contact lens, wherein the capacitive circuit comprises:
• a first node, a second node, a third node, and a fourth node;
• a first capacitor connected between the first node and the second node,
• a second capacitor connected between the third node and the fourth node, and
• a switched capacitor network or variable capacitor connected between the second node and the third node, wherein the capacitance of the capacitive circuit corresponds to a combined capacitance of at least the first capacitor, second capacitor, third capacitor, and the switched capacitor network or the variable capacitor.