PURPOSE To evaluate retinal function by intraoperative electroretinograms (ERGs) before and after core vitrectomy. DESIGN Retrospective consecutive case series. METHOD Full-field photopic ERGs were recorded prior to the beginning and just after core vitrectomy using a sterilized contact lens electrode in 20 eyes that underwent non-complicated vitreous surgery. A light-emitted diode was embe...

Pattern-reversal and flash electroretinograms (ERG) and oscillatory potentials (OP) were recorded from 11 patients with unilateral glaucoma. All glaucomatous eyes had reduced amplitudes both compared to the opposite eye in the same patient and to reference values. In 10 of the 11 cases this reduction was below the level of normal variation. The difference in pattern-reversal ERG amplitude means...

Dear Sir, The article by McMahon and Barlow (1992) in this issue seeks to reinterpret some results reported in a prior publication in this journal (Dearry and Barlow, 1987). McMahon and Barlow (1992) suggest that a "fast" response observed in the previous electrical recordings originates from eye movement, and that this potential was incorrectly interpreted as the b-wave of the electroretinogra...

ABSTR^CT.--Electroretinograms were recorded from four Great Horned Owls (Bubo virginianus). Two procedures, dark adaptation and flicker stimuli, were used to assess the contributions of rod and cone systems to electroretinograms. Recordings obtained after dark adaptation demonstrated scotopic (rodgenerated) components. B-waves were broad and rounded and had a fairly long latency. When high inte...

The genetic locus causing autosomal dominant retinitis pigmentosa (adRP) has recently been mapped in a large English family to chromosome 7p. Eight affected members of this family were studied electrophysiologically and psychophysically with dark adapted static threshold perimetry and dark adaptometry. The phenotypes observed fell into three categories: minimally affected with no symptoms, and ...

PURPOSE To study local retinal cone function in patients with X-linked retinoschisis (XLRS) by multifocal ERGs (mfERGs). METHODS mfERGs were recorded from seven eyes of seven patients with XLRS (mean age +/- SD, 22.1 +/- 3.2 years; range, 18 to 25 years). Five eyes had microcystic changes in the macula and two eyes had nonspecific macular degeneration. Two eyes had peripheral retinoschisis, a...