MYRA PET CLINIC & SURGERY CENTRE ELECTRORETINOGRAPHY ( ERG ) Electroretinography (ERG) is the study of electrical potentials produced by the retina when light strikes the retina. The purpose of the ERG is simply to differentiate blindness of retinal origin from that of optic nerve or central origin, or to verify adequate retinal function prior to cataract surgery. If you have any such eye related queries contact MYRA PET CLINIC & SURGERY CENTRE OR CALL 9826742678 VETERINARY SURGEON | VETERINARY DOCTOR | VETERINARY DOCTOR IN INDORE | VETERINARY SURGEON IN INDORE | PET CLINIC IN INDORE | PET DOCTOR IN INDORE |VETERINARY OPHTHALMOLOGIST.