Anmeldung zur Tagung
Registration
Grußwort
Invitation
Themen
Topics
Allgemeiner Ablauf
General overview
Wissenschaftliches Programm
Scientific program
Kurse
Courses
Symposien
Symposiums
Frühstück mit Spezialisten
Breakfast with specialists
Arzthelferinnen-Fortbildung
Rahmenprogramm
Social program
DOG Information
DOG Information
Allgemeine Informationen
General Information
Autorenindex
Index of Authors
Ausstellerliste
Exhibitors
Sponsoren
Sponsors
Teilnahmegebühren
Registration fees
Impressum
Multifocal Fast Pattern Reversal ERG for Detecting Glaucomatous Visual Field Defects
Lindenberg T., Horn F., Rühl S., Korth M.
Augenklinik mit Poliklinik der Friedrich-Alexander-Univ. Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen
Purpose: Conventional pattern reversal ERGs are often used in
glaucoma diagnosis. Goal of our examinations: To detect local visual field
defects caused by glaucomatous optic atrophy with a multifocal steady-state
pattern reversal ERG (mfERG).
Methods: 15 patients (28 eyes) with progressive glaucomatous visual
field defects in static perimetry were examinated. The mfERGs were recorded
with the RETIscan system (Roland Consult) and DTL-electrodes. Stimulus:
chequerboard pattern reversal, 19 or 37 segments with 12 squares each,
contrast >98%, sweep length 171 ms. To minimize light scattering effects
a constant segment size was used. We evaluated amplitudes of the 1st response
and the FFT of 3 pattern reversals. Across several segments the mean amplitude
value of areas with local visual field defects (MD >15) was divided
by the mean amplitude value of adequate areas (equal area size, equal
distance from fovea) without defects. In cases of extensive unilateral
diffuse visual field losses (MD >10) the mean amplitude value of the
whole field (diameter 60°) was divided by the mean amplitude value
of the other - normal - eye.
Results: In intraocular comparsions the quotient averaged 0.97;
in interocular comparsions it averaged 0.85. Comparsion of data pairs
(intra- and interocular) resulted in no significant differences (p >0.05).
Conlusion: The multifocal steady-state pattern reversal ERG seems
not to be able to detect local glaucomatous visual field losses. Financially
supported by the DFG (SFB 539)