Relationship between N95 amplitude of pattern electroretinogram and optical coherence tomography angiography in open-angle glaucoma

Taekjune Lee, Du Ri Seo, Joo Yeon Kim, Wungrak Choi, Sang Yeop Lee, Jun Mo Lee, Gong Je Seong, Chan Yun Kim, Hyoung Won Bae

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Purpose: The pattern electroretinogram (PERG) is useful to detect retinal ganglion cell (RGC) damage in patients with glaucoma. Optical coherence tomography angiography (OCTA) measures retinal vessel density (VD), which is known to be reduced in glaucoma. There may be correlations between parameters of the PERG and OCTA in open-angle glaucoma (OAG). Methods: In total, 95 eyes of 95 OAG patients and 102 eyes of 102 normal controls were included in this study. N35, P50, and N95 latency along with P50 and N95 amplitude were obtained using the PERG. Retinal VD was measured around the peripapillary and macular area according to the ETDRS grid (concentric circles with diameters of 1, 3, and 6 mm), which is named a center (≤1 mm), an inner (1–3 mm), an outer (3–6 mm), and a full (≤6 mm) area. Pearson correlation analysis was done between parameters, and partial correlation analysis was done after adjusting confounding factors. Results: P50 amplitude, N95 amplitude, and VD of most measured areas were significantly lower in the OAG group compared to the normal group. N95 amplitude showed a statistically significant correlation with parameters of optical coherence tomography and visual field, peripapillary outer and full VD, and macular outer and full VD even after adjusting confounding factors. There was no significant correlation between parameters in the normal group. Conclusions: N95 amplitude was associated with structural and functional change including VD reduction in OAG. Microvascular alterations may be associated with dysfunctional changes of RGC recorded by the PERG in OAG.

Original languageEnglish
Article number3854
Pages (from-to)1-13
Number of pages13
JournalJournal of Clinical Medicine
Issue number12
Publication statusPublished - 2020 Dec

Bibliographical note

Publisher Copyright:
© 2020 by the authors. Licensee MDPI, Basel, Switzerland.

All Science Journal Classification (ASJC) codes

  • General Medicine


Dive into the research topics of 'Relationship between N95 amplitude of pattern electroretinogram and optical coherence tomography angiography in open-angle glaucoma'. Together they form a unique fingerprint.

Cite this