ELECTRODE DEVICE FOR OPTICAL STIMULUS OF ELECTRORETINOGRAPH

PURPOSE:To prevent heat generation by light and lighten the burden of an eye and prevent the introduction of electric noise to an electroretinograph(ERG) electrode by feeding light from a light source portion provided on one end of an optical fiber the other end of which is installed on a contact lens which has an electrode and which is installed on an eyeball, via the optical fiber. CONSTITUTION:A contact lens 4 for giving optical stimulus 3 is installed on an eyeball 1, and an ERG electrode 6 is annularly formed on the contact lens 4 while installing one side end of an optical fiber 11 on the backside thereof. The other end of the optical fiber 11 is connected to a light source portion 5 while being divided into single-core optical connectors 11b so as to be oppositely placed to the light emitting faces of a group of light emitting elements 5a of the LEDR, LEDG, LEDB of R, G, B in the light source portion 5. The group of light emitting elements 5a emits light by the feed of voltage from a power source portion 8 through a power cable 7. Heat which is generated by the group of light emitting elements 5a is not transmitted to the contact lens 4 lightening the burden of the eyeball 1, while no existence of the power cable 7 for driving the group of light emitting elements 5a on the periphery of an optical-stimulus electrode device can prevent the introduction of noise which is generated at the time of ON/OFF of the power source portion 8 to the ERG electrode.