title: Unilateral electronegative ERG in a presumed central retinal artery occlusion.
abstract: A unilateral electronegative electroretinogram (ERG) was seen in a 94-year-old man with presumed central retinal artery occlusion. Goldmann perimetry revealed central scotoma in the right eye and no abnormalities in the left eye. Full-field ERG in the right eye described a reduction of the b-wave with a relative preservation of the a-wave which is characteristic of electronegative ERG. Hence, our case illustrates that ERG testing is essential for the work-up of individuals with suspected retinal vascular disorders.
authors.affiliation: Federal University of Sao Paulo (UNIFESP), Sao Paulo, Brazil.
authors.forename: Luiz H
authors.initials: LH
authors.lastname: Lima
authors.forename: Wener
authors.initials: W
authors.lastname: Cella
authors.forename: Claudia
authors.initials: C
authors.lastname: Brue
authors.forename: Stephen H
authors.initials: SH
authors.lastname: Tsang