The relation between the visual acuity and response density of multifocal electroretinogram Toshiro Mori 1 , Chiaki Kato 1 , Satoko Nakajima 1 , Yong Li 1 1Dept of Ophthalmol Iwate Prefec Central Hosp pp.485-488
Published Date 1997/4/15
DOI https://doi.org/10.11477/mf.1410905291
  • Abstract
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We recorded multifocal electroretinogram (MERG) in 6 eyes of 6 normal subjects and in 14 eyes of 8 cataract patients. The ages averaged 29.1±3.4 years in the former group and 65.0± 7.2 years in the latter. The response density of positive waves of MERG from the fovea and the parafovea within 2.7 degrees from the fixating point was suppressed significantly after reducing the visual acuity to 0.1 to 0.3 with an occluder in normal subjects (p < 0.01, p < 0.05) . The response density was smaller in cataract eyes than in normal subjects (p<0.01). It was smaller in cataract eyes with visual acuity under 0.4 than in those with visual acuity between 0.5 and 0.9 (p<0.05). No differences were present in peak latencies. It is concluded that the visual acuity is one of the important factors to record stable MERG.

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