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Electroretinogram changes after scleral buckling surgery of retinal detachment

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Abstract

Objective To observe changes in visual function after a single scleral buckling surgery for rhegmatogenous retinal detachment (RD) by using ERG (electroretinogram). Methods One eye from 56 patients with rhegmatogenous RD was chosen. Forty-three corresponding normal fellow eyes from these patients were chosen as controls. Single scleral buckling surgery was carried out and a full-field ERG was performed before the surgery, and 1 and 6 months after surgery. Results The mean amplitude of ERG decreased and the latency (except for the a-wave) was delayed in the eye with a retinal detachment, and wavelets of the oscillatory potential decreased or were completely lacking. One month after surgery, the amplitudes of the a and b waves were noticeably improved (except for the 30 Hz flicker responses), but the latency (except for the a-wave) was still delayed. The ratio of b/a (mixed response) increased 1 month after surgery, with no further changes thereafter. The amplitude of the scotopic b wave was 58.1% of the control eyes, while the 30 Hz flicker responses was only 45.8% of controls; the difference between the two responses was significant (P < 0.001). The number of oscillatory potential wavelets increased, but the total amplitude of the oscillatory potentials did not exhibit any obvious changes during the follow-up period (P = 0.20). In the 41 patients whose detachment involved the macula preoperatively, the amplitude of the 30 Hz flicker responses improved significantly after surgery (P = 0.037). Six months after the operation, the wave amplitudes were not significantly different from 1 month after surgery, but there was a tendency toward a decrease in the latency. Conclusions After reattachment of the retina, visual function showed dramatic improvement 1 month after the surgery. The postreceptoral responses recovered more than the a-wave. The rod system recovered more quickly and completely than the cone system during the follow-up period. The incomplete recovery observed by using ERGs indicates that there is irreversible damage that likely occurs following retinal detachment and surgery.

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Acknowledgements

This research was supported by grants from the Science and Technology Commission of Shanghai Municipality (05dz22322) and grants from the Shanghai vision rehabilitation clinical medical center.

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Authors and Affiliations

  1. Department of Ophthalmology, The First People’s Hospital Affiliated Shanghai Jiaotong University, Wujin Road No. 85#, Shanghai, 200080, China

    Yuanyuan Gong, Xingwei Wu, Xiaodong Sun, Xi Zhang & Ping Zhu

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  1. Yuanyuan Gong
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  2. Xingwei Wu
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  3. Xiaodong Sun
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  4. Xi Zhang
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  5. Ping Zhu
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Correspondence to Xingwei Wu.

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Gong, Y., Wu, X., Sun, X. et al. Electroretinogram changes after scleral buckling surgery of retinal detachment. Doc Ophthalmol 117, 103–109 (2008). https://doi.org/10.1007/s10633-007-9109-2

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  • DOI: https://doi.org/10.1007/s10633-007-9109-2

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