Fusion and Suppression in Patients with Unilateral Idiopathic Epiretinal Membrane
- Authors
- Cho, In Hwan; Park, Un Chul; Kim, Seong Joon; Ryoo, Na-Kyung; Yu, Hyeong Gon
- Issue Date
- 1-Jul-2021
- Publisher
- 대한안과학회
- Keywords
- Epiretinal membrane; Metamorphopsia; Suppression; Sensory fusion; Stereopsis
- Citation
- 대한안과학회지, v.61, no.7, pp 765 - 771
- Pages
- 7
- Journal Title
- 대한안과학회지
- Volume
- 61
- Number
- 7
- Start Page
- 765
- End Page
- 771
- URI
- https://scholarworks.bwise.kr/sch/handle/2021.sw.sch/2664
- DOI
- 10.3341/jkos.2020.61.7.765
- ISSN
- 0378-6471
2092-9374
- Abstract
- Purpose: To investigate the presence of fusion and suppression in patients with unilateral idiopathic epiretinal membrane (ERM). Methods: Thirty-five patients with unilateral idiopathic ERM received a full ophthalmologic exam including best corrected visual acuity (BCVA). Patients were divided into suppression and non-suppression groups according to the results of 4 Prism Dioptre Base-out Test and Worth 4 Dot test. Age, symptoms, duration of ERM, BCVA, average M-chart score, results of Titmus test and optical coherence tomography parameters were compared between the two groups. Factors associated with suppression were also evaluated. Results: Eleven (31%) of 35 patients had suppression. The BCVA (0.18 +/- 0.12 vs. 0.29 +/- 0.12 p = 0.019) and stereopsis (2.25 +/- 0.27 vs. 2.66 +/- 0.62, p = 0.009) were significantly lower in the suppression group than the non-suppression group. Median age was older (63.21 +/- 9.64 vs. 70.82 +/- 6.80, p = 0.013) and duration of ERM (7.86 +/- 3.69 vs. 18.54 +/- 14.92 months, p = 0.004) was longer in the suppression group than the non-suppression group. Average M-chart score was higher in the suppression group. However, not all the patients suffered from metamorphopsia, including the suppression group when using binocular vision. Conclusions: Unilateral suppression is common in unilateral idiopathic ERM and influences the patient's stereopsis. Suppression was significantly correlated with age, duration of symptoms and metamorphopsia.
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