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Impressum
Changes in the Multifocal Electroretinogram in patients with agerelated macular degeneration after Macular Translocation and 360° Retinotomy
Farvili E., Widder R. A., Walter P.
Department of Ophthalmology - University of Cologne, Germany
Objective: Macular translocation with 360° retinotomy may
help to improve or stabilize visual acuity in patients suffering from
age-related macular degeneration. We employed multifocal electroretinography
(MERG) to analyze the retinal function pre- and post surgery.
Methods: 10 patients underwent macular translocation with 360°
retinotomy. One week before surgery MERG was recorded. At least four weeks
after silicone oil removal the MERG was recorded again.
Results: Before surgery seven patients showed a reduction of the
central MERG in comparison to the peripheral MERG. After surgery the central
and the peripheral MERG (a- and b-wave) was reduced. The amplitudes of
the a- and b-wave in ring 1 (central area) were less reduced compared
to the peripheral amplitudes (ring 2, 3, and 4) whereas the a-wave showed
in part a stable follow-up.
Conclusion: The central MERG did not show an improvement of the
retinal function after surgery. However the amplitude of the a-wave in
the central area was less reduced and in part stable when compared to
the peripheral amplitude. This may suggest an intact neuro-retinal function
in the central area. A follow-up of e.g. 12 months after surgery is necessary
for further evaluation of this observation.