May 2004
Volume 45, Issue 13
Free
ARVO Annual Meeting Abstract  |   May 2004
Regional Assessment of Cone System Function Following Uncomplicated Retinal Detachment Surgery
L. Montrone; L. Ziccardi; G. Stifano; M. Piccardi; F. Molle; F. Focosi; A. Fadda; B. Falsini
Author Affiliations & Notes
  • L. Montrone
    Ophthalmology, Catholic University, Rome, Italy
  • L. Ziccardi
    Ophthalmology, Catholic University, Rome, Italy
  • G. Stifano
    Ophthalmology, Catholic University, Rome, Italy
  • M. Piccardi
    Ophthalmology, Catholic University, Rome, Italy
  • F. Molle
    Ophthalmology, Catholic University, Rome, Italy
  • F. Focosi
    Ophthalmology, Catholic University, Rome, Italy
  • A. Fadda
    Tecnologie e Salute, Istituto Superiore di Sanita', Rome, Italy
  • B. Falsini
    Ophthalmology, Catholic University, Rome, Italy
  • Footnotes
    Commercial Relationships  L. Montrone, None; L. Ziccardi, None; G. Stifano, None; M. Piccardi, None; F. Molle, None; F. Focosi, None; A. Fadda, None; B. Falsini, None.
  • Footnotes
    Support  Ministero Istruzione Universita' e Ricerca, Core Grant 2003
Investigative Ophthalmology & Visual Science May 2004, Vol.45, 2055. doi:
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      L. Montrone, L. Ziccardi, G. Stifano, M. Piccardi, F. Molle, F. Focosi, A. Fadda, B. Falsini; Regional Assessment of Cone System Function Following Uncomplicated Retinal Detachment Surgery . Invest. Ophthalmol. Vis. Sci. 2004;45(13):2055.

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Abstract

Abstract: : Purpose:To evaluate regional cone system function after uncomplicated retinal detachment (RD) surgery by recording focal electroretinograms (FERGs) from the central and paracentral regions of the posterior pole. Methods:FERGs in response to either a central (eccentricity: 0–2.25 deg) or a paracentral annular (2.25–9 deg) uniform field, presented on a light–adapting background and sinusoidally flickered at 41 Hz (95% modulation depth, 93 cd/m2 mean luminance) were recorded from 15 eyes (15 patients) two weeks to 198 months following uncomplicated RD surgery (encircling procedure with or without scleral buckling). Preop., seven out of 15 eyes had a macular RD. Mean time elapsed from onset of symptoms to surgery was 20 days (range: 5–90 days). Postop. visual acuity was 20/30 (mean, range: 20/200–20/20). Twelve age–matched normal subjects served as controls. Amplitude and phase of the FERG fundamental harmonic were measured. Results:Compared to control eyes, affected eyes’ central and paracentral FERGs were on average reduced in amplitude (by 40 and 28%, respectively, p < 0.01) and delayed in phase (by 70 and 100 degrees, respectively, p < 0.01). No significant differences were found between eyes with or without macular RD. In individual affected eyes, central, but not paracentral FERG amplitudes were negatively correlated (r = –0.5, p < 0.05) with time elapsed from onset of symptoms to surgery, and positively correlated (r = –0.5, p < 0.05) with visual acuity. Conclusions:Central and paracentral cone system dysfunction may be detected even at lengthy time intervals from retinal reattachment, independent of preop. macular RD. The extent of central loss appears to be inversely related to preop. RD duration, in agreement with previous reflectometric findings on foveal cone photopigment density.1 1Liem et al. Ophthalmology 1994; 10:1945–1951

Keywords: retinal detachment • electroretinography: clinical • macula/fovea 
© 2004, The Association for Research in Vision and Ophthalmology, Inc., all rights reserved. Permission to republish any abstract or part of an abstract in any form must be obtained in writing from the ARVO Office prior to publication.
Copyright © 2025 Association for Research in Vision and Ophthalmology.
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