Open AccessThe 30‐Hz flicker cone ERG for monitoring the early course of central retinal vein occlusion
Author(s) -
Larsson Jörgen,
Bauer Birgitta,
Andréasson Sten
Publication year - 2000
Publication title -
acta ophthalmologica scandinavica
Language(s) - English
Resource type - Journals
eISSN - 1600-0420
pISSN - 1395-3907
DOI - 10.1034/j.1600-0420.2000.078002187.x
Subject(s) - erg , medicine , central retinal vein occlusion , flicker , electroretinography , occlusion , ophthalmology , flicker fusion threshold , retinal , retina , surgery , optics , macular edema , physics , electrical engineering , engineering
ABSTRACT. Purpose: Investigation of the full‐field ERG (electoretinography) within 24 hours after the onset of symptoms in central retinal vein occlusion, and repeated examination within the following days and weeks. Methods: Seven patients with central retinal vein occlusion were examined with full‐field ERG within less than 24 hours after the onset of their symptoms and every second to third day during the first 3 weeks. They were then followed for a period of time of six months. Results: The amplitudes as well as the implicit times in the 30 Hz flicker ERG changed considerably within the first three weeks. In the three patients who developed rubeosis, the cone b‐wave implicit times as well as the amplitudes were altered considerably. In the patients that did not develop rubeosis, the cone b‐wave implicit times as well as the amplitudes in the 30 Hz flicker ERG were more stable. Conclusion: The full‐field cone ERG reflects the retinal function and the ERG parameters change considerably during the first weeks after the onset of the central retinal vein occlusion. The 30 Hz flicker ERG gives important information concerning the early development of the disease. The optimal time to do a predictive ERG could be after three weeks.