title: Method for recording a pattern electroretinogram of the macula.
abstract: This paper describes the construction and use of a gold foil electrode for pattern electroretinography. The electrode, a multilaminated structure of Mylar (polyethylene terephthalate) cassette splicing tabs, gold foil and a single 38-gauge strand of wire, is comfortable for 20 minutes with one drop of anesthetic and can be used at least 20 times. With a checkerboard square-wave television pattern stimulator of 80% contrast and an average luminance of 65 cd/m2 set at 15 reversals per second, a diagonal field of 12 degrees and a check of 44 minutes of arc, responses of 10 to 20 microV (control values 4 to 5 microV) were obtained in 80% of normal subjects. This method should prove to be useful in the diagnosis of early mascular disease.
mesh_terms: D004596:Electroretinography / Q000295:instrumentation* / Q000379:methods; D006046:Gold; D006801:Humans; D008266:Macula Lutea / Q000503:physiopathology*; D011093:Polyethylene Terephthalates; D012164:Retinal Diseases / Q000175:diagnosis*; D013690:Television
chemical_list: D011093:Polyethylene Terephthalates; D006046:Gold