A system includes a conducting element that conducts energy from an energy source to apply therapy to an eye. The system includes a covering configured to be removably attached to the conducting element. The covering has an interface surface that is positionable at an eye. At least a portion of the interface surface includes one or more dielectric materials. Energy is deliverable to the eye through the interface surface. In one aspect, the covering provides an electrical insulator to minimize the concentration of electrical current in the area of contact with the eye. In another aspect, the covering allows the eye to be cooled during the application of energy without directly applying coolant to the eye. In another aspect, the covering includes a dielectric layer that may provide varying impedances that allow different patterns for energy delivery. In another aspect, the sheath promotes hygienic use of the conducting element.
