A therapeutic device for correcting presbyopia in an eyeball having a ciliary muscle and a plurality of suspensory ligaments connecting the ciliary muscle to a lens includes an over-mold that mirrors a contact lens and fits against the eyeball. The over-mold encapsulates a micro thermoelectric generator (“μTEG”) that powers an electrical disc sub-assembly configured for sensing an activation of the ciliary muscle from a relaxed state, in which the ligaments are pulled taut and the lens is stretched into a flat position for distant focus, toward a contracted state, in which the ligaments become less taut and the lens moves into a rounded position for nearby focus. When the ciliary muscle is contracted, the sub-assembly stimulates the ciliary muscle with a minute electric muscle stimulation (“EMS”) to further contract the ciliary muscle, thereby further relaxing the ligaments to further improve nearby focus. Other embodiments are disclosed.
