Multifokale Elektroretinographie bei retinalen Gefäßverschlüssen
To examine and quantify the central retinal function in patients with retinal vascular disorders such as CRVO, BRVO and BRAO using the multifocal ERG. We examined 23 patients (9 patients with CRVO (age 67,2±9,8 years), 7 patients with BRVO (85,7±11,0) and 7 patients with BRAO (65,3±14,0) using a RETI-scan device (Roland Instr., Wiesbaden) and stimulated by an ELSA 20“-VGA-monitor. As resolution we used 61 hexagons within a 24 deg. visual field. We compared the examination results of the affected eyes with the non-affected eyes of the patients and with standard values of a normal collective. CRVO and BRVO: Diminuation of a- and b- wave amplitude tendentially compared with the normal collective and significantly compared to the fellow eye (p<0,0001). BRAO: No significant amplitude changes could be detected in our collective of patients. The latency of the b-wave was significantly delayed in all three groups compared to normal and to fellow eye (p<0,0001). Retinal vascular occlusions lead to characteristical changes in multifocal electroretinography. Future studies have to show if this technique can give prognostic information about neovascularisation risks. The intraindividual comparison of affected and fellow eye promises to be more sensitive than comparison with a normal collective.
info:eu-repo/classification/ddc/610, Medizin, mfERG, Gefäßverschlüsse
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