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KMID : 1151620200050020106
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Journal of Retina
2020 Volume.5 No. 2 p.106 ~ p.112
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Related Factors and Inner Retinal Dimples Induced by Internal Limiting Membrane Peeling
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Shin Yong-Kyun
Lee Geun-Woo
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Abstract
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Purpose: To describe inner retinal dimples in patients who underwent epiretinal membrane (ERM) or macular hole (MH) surgery, and to analyze factors affecting the occurrence of inner retinal dimples between ERM and MH patients.
Methods: This was a retrospective observational study. Patients who underwent ERM or MH surgery involving internal limiting membrane peeling from January 2018 to December 2018 were enrolled. Among 191 patients, 28 patients were identified. These patients were subdivided by ERM type (diffuse, cystoid macular edema, pseudolamellar hole type) and posterior vitreous detachment stage of MH. Two months after surgery, the number of inner retinal dimples was analyzed using en-face imaging. The location of the inner retinal dimple and intraoperative findings (pinch or retinal hemorrhage) were compared.
Results: On en-face imaging, inner retinal dimples were detected in 18 (17.3%) of 104 eyes with ERM and 10 (26.3%) of 38 eyes with MH. The number of inner retinal dimples in the MH group was significantly greater (p = 0.049) than in the ERM group. In the ERM group, the pseudolamellar hole type was associated with more inner retinal dimples, as was higher metamorphopsia score (p = 0.023). The locations of retinal hemorrhages matched inner retinal dimples better than the locations of pinches (all p < 0.05).
Conclusions: Retinal hemorrhages, as well as the iatrogenic trauma associated with pinches, are associated with inner retinal dimples. Inner retinal dimples were more frequently associated with MH than ERM. Among the ERM group, pseudo lamellar hole type was more observed than other types. Ophthalmologist should be aware of the risk of inner retinal dimple in cases with internal limiting membrane peeling.
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KEYWORD
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Epiretinal membrane, Inner retinal dimple, Internal limiting membrane peeling, Macular hole
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