Japanese Journal of Ophthalmology

, Volume 62, Issue 3, pp 280–285 | Cite as

Comparison of visual acuity, metamorphopsia, and aniseikonia in patients with an idiopathic epiretinal membrane

  • Atsuhiro Tanikawa
  • Yoshiaki Shimada
  • Masayuki Horiguchi
Clinical Investigation
  • 22 Downloads

Abstract

Purpose

The clinical course of reduced visual acuity, metamorphopsia, and aniseikonia are dissimilar in patients with an epiretinal membrane (ERM). We measured and compared the best-corrected visual acuity (BCVA), metamorphopsia, and aniseikonia of patients with ERM.

Methods

We measured metamorphopsia and aniseikonia horizontally as well as vertically with the M-CHART (MH and MV) and New Aniseikonia Test (NATH and NATV) in 61 patients with unilateral idiopathic ERM. We compared the BCVA with the other values. Comparisons between the MH and the NATV and between the MV and the NATH were performed, because the MH assesses vertical metamorphopsia, and the MV, horizontal metamorphopsia.

Results

BCVA was not significantly correlated with the other values (MH vs BCVA: P = .69; MV vs BCVA: P = .114; NATH vs BCVA: P = .656; NATV vs BCVA: P = .935). The MH and NATV magnitudes were significantly correlated, but the correlation coefficient was small (P = .007, r = 0.343); no significant correlation was found between the MV and NATH magnitudes (P = .065). We found patients with aniseikonia, but no metamorphopsia (n = 6), and more patients with metamorphopsia, but no aniseikonia (n = 11). Only 23 patients had coincident directions of metamorphopsia and aniseikonia.

Conclusions

The magnitudes of metamorphopsia and aniseikonia were not closely correlated and their directions did not coincide in most patients. Neither the M-CHARTS nor the NAT measurements correlated with the BCVA. Quantitative testing of metamorphopsia and aniseikonia in addition to that for BCVA is necessary to assess visual function in patients with ERM.

Keywords

Aniseikonia Epiretinal membrane Metamorphopsia Retina Visual acuity 

Notes

Acknowledgements

None.

Conflicts of interest

A. Tanikawa, None; Y. Shimada, None; M. Horiguchi, None.

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Copyright information

© Japanese Ophthalmological Society 2018

Authors and Affiliations

  • Atsuhiro Tanikawa
    • 1
  • Yoshiaki Shimada
    • 1
  • Masayuki Horiguchi
    • 1
  1. 1.Department of OphthalmologyFujita Health University School of MedicineToyoakeJapan

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