Electroretinographic changes in eyes with idiopathic macular hole treated by vitrectomy

We recorded full-field electroretinograms before and after vitrectomy in 18 eyes of 18 patients with idiopathic macular hole. The results were compared between affected and fellow eyes in the preoperative and early (within 10 days) and late (3 to 6 months) postoperative periods. No significant chang...

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Bibliographic Details
Published in:Documenta ophthalmologica 1997-01, Vol.94 (4), p.341-354
Main Authors: MATSUMOTO, C. S, TATSUKAWA, T, MASAMOTO, IMAIZUMI, NAKATSUKA, K
Format: Article
Language:English
Subjects:
Adult
Aged
Biological and medical sciences
Dark Adaptation
Electroretinography
Female
Follow-Up Studies
Humans
Male
Medical sciences
Middle Aged
Photic Stimulation
Photoreceptor Cells, Vertebrate - physiology
Retina - physiopathology
Retinal Perforations - physiopathology
Retinal Perforations - surgery
Surgery (general aspects). Transplantations, organ and tissue grafts. Graft diseases
Surgery of the eye and orbit
Visual Acuity
Vitrectomy
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Summary:We recorded full-field electroretinograms before and after vitrectomy in 18 eyes of 18 patients with idiopathic macular hole. The results were compared between affected and fellow eyes in the preoperative and early (within 10 days) and late (3 to 6 months) postoperative periods. No significant changes between affected and control eyes were found in the amplitude of the rod electroretinogram, mixed cone-rod electroretinogram, cone electroretinogram a- and b-waves or 30-Hz flicker electroretinogram in all stages of the study. The peak implicit times of the cone electroretinogram (a- and b-wave) and dark- and light- adapted oscillatory potential (O1-O4), however, were delayed. Also, the amplitude of the oscillatory potentials (O1+O2+O3+O4) was significantly reduced in the early postoperative period. By the late period, all of these changes had resolved. We concluded that electrophysiologic changes were derived from a transitory dysfunction of the inner retina. The possible causes of the electroretinographic changes would include mechanical trauma of the surgery, intravitreous air tamponade or the changes in vitreous electrolytes after surgery. Oscillatory potentials were more sensitive than a- and b-waves in eliciting dysfunction of the inner retina in operate on eyes.
ISSN:0012-4486
1573-2622
DOI:10.1007/BF02580859