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Documenta Ophthalmologica

, Volume 131, Issue 1, pp 43–51 | Cite as

Peripheral retinal function assessed with 30-Hz flicker seems to improve after treatment with Lucentis in patients with diabetic macular oedema

  • Kristina HolmEmail author
  • Marion Schroeder
  • Monica Lövestam Adrian
Original Research Article

Abstract

Purpose

To evaluate the influence of ranibizumab on the multifocal electroretinogram (Mf-ERG), full-field electroretinogram (Ff-ERG) and optical coherence tomography (OCT) in diabetic eyes (n = 20) with macular oedema.

Methods

In 20 eyes (20 diabetic subjects) with no or background diabetic retinopathy and macular oedema (age 65.7 ± 9.8 years, duration 16.5 ± 10.0 years), the change in ETDRS letters, Mf-ERG, Ff-ERG and OCT was analysed, at baseline, 4 weeks after the first injection, (just before the second injection), and 4 weeks after the last injection with ranibizumab.

Results

From baseline, mean BCVA improved from 64.0 ± 10.0 ETDRS letters to 75.0 ± 7.3 ETDRS letters (p = 0.005) 1 month after the last injection. Mean OCT thickness reduced after the first injection from 418 ± 117 to 311 ± 126 µm; (p = 0.001) and to 302 ± 74 µm after the third injection. Mf-ERG demonstrated in the innermost three rings a shorter implicit time after the first injection with p values of 0.002, 0.005 and 0.017, respectively. After the third injection, implicit time was prolonged to almost the original levels. Cone implicit time with 30-Hz flicker improved significantly between baseline (35.5 ± 3.6 ms) and final follow-up (34.6 ± 3.1 ms) (p = 0.04).

Discussion

Though the central retinal thickness was reduced after three injections of ranibizumab and the subjects gained a mean of 11 ETDRS letters, there was no significant change in amplitude or implicit time in Mf-ERG. The shortened 30-Hz flicker implicit time might imply that ranibizumab has no negative impact on the entire peripheral cone function, but can improve it instead.

Keywords

Ranibizumab Diabetes Macular oedema Mf-ERG Ff-ERG OCT 

Notes

Acknowledgments

This study was supported by Novartis Sweden AB.

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Copyright information

© Springer-Verlag Berlin Heidelberg 2015

Authors and Affiliations

  • Kristina Holm
    • 1
    Email author
  • Marion Schroeder
    • 1
  • Monica Lövestam Adrian
    • 1
  1. 1.Department of OphthalmologyUniversity of LundLundSweden

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