Ophthalmic device to diagnose the eye fundus

摘要: The present invention provides an ophthalmic device to diagnose the circulation of blood in eye fundus by producing a pair plethysmograms for synchronized comparison. A fiber optic conduits are attached coupler that can be sealingly affixed exterior surface cornea eye. application subatmospheric pressure within coupler. Light is introduced on axis pupil through central light exit region physically small enough relative dilated prevent reflection from iris. reflected received peripheral receiving region. signals converted into electrical voltage levels ultimately used produce visual display plethysmograms.