Electrical apparatus and methods for an eye

Disclosed is electrical apparatus for stimulating and/or monitoring an eye of a patient, comprising an implantable electrode device and a lead extending outwardly from the implantable device, the lead including a section that locates externally to the eye having at least one pre-formed bend. Also disclosed is a lead connected to an implantable electrode device, the lead having one or more stripes that extend along at least a portion of the lead. Also disclosed is an implantable device having a substrate and at least one electrode, the electrode having at least one aperture through which material of the substrate extends to anchor the electrode to the substrate. Other disclosed features relate to a foldable anchor device, a curved electrode substrate and depth markers, for example.