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
Mf-ERG : Retinopathia Solaris versus Retinitis Photoelectrica
Tesnau R., Bullin M., Welt R.
Augenklinik des Klinikums der Stadt Ludwigshafen am Rhein, Bremserstrasse 79, D-67063 Ludwigshafen
Introduction: Due to the last eclipse on August 11th, 1999, in
Central Europe 17 patients with subjective complaints and a positive history
of sun gazing were seen in the outpatient department of our eye clinic.
8 patients showed temporarily modifications of the First-Order-Kernel
mf-ERG. These changements were discussed as a result of a toxic chain
reaction involving the photoreceptor cells due to an excessive UV-radiation.
Now we want to compare the electrophysiological results from two patients:
one of them was referred with a phototoxic maculopathy after keratitis
photoelectrica, in the other one the phototoxic maculopathy was caused
by arc welding.
Methods: Multifocal ERG (First-Order-Kernel) was performed by 17
patients in Mydriasis (61 hexagons, factor of distortion 4, 20'-Monitor).
To evaluate the results we regarded: 1. the size of the potentials (nV/deg2),
2. the symmetry and the distribution of the potentials from central to
periphery and 3. the foveolaric peak in the 3-D-image (a reduction of
that peak would be judged as pathologic).
Results: Due to the same pathomechanism the recorded mf-ERG results
in retinitis photoelectrica seemed to be similar to those known from retinopathia
solaris. In a follow-up two weeks later, we obtained not only persisting
but also increasing irregularities in mf-ERG - nevertheless the visual
acuity had recovered. The size of the recorded mf-ERG potentials hadn't
been reduced.
Conclusion: Even if the pathological mechanism in phototoxic maculopathy
after UV-radiation (photochemical) seemed to be similar to that after
arc welding (photoelectrical), we obtained different mf-ERG recordings
with a normal visual acuity: in retinitis solaris the mf-ERG recovered,
in retinitis photoelectrica we noticed persisting irregularities even
two weeks later. In order to confirm these results more patients had to
be seen. In retinitis photoelectrica follow-up exams will reveal the development
of this patient.