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Sung Il Kang; Effect of changes in central macular thickness (CMT) and shape on visual acuity after idiopathic epiretinal membrane (ERM) removal. Invest. Ophthalmol. Vis. Sci. 2016;57(12):4066. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To evaluate the effect of postoperative changes in central macular thickness CMT and shape on final visual acuity after idiopathic ERM removal
Fifty three eyes which underwent vitrectomy for idiopathic ERM and followed for more than 12 months were included in this study. The optical coherence tomography (OCT) images of preoperative and postoperative foveal contour with ERM were classified into 3 groups being flat, convex, and concave. CMT and best corrected visual acuity (BCVA) were measured at final visit and changes in CMT and shape before and after surgery were evaluated. And influence of internal limiting membrane peeling (ILM) on them examined in same manner.
Postoperative BCVA was statistically significantly improved in each group (p<0.05, p<0.001, p<0.001), and CMT was statistically significantly decreased in each group (p<0.05, p<0.001, p<0.01). But changes of CMT and shape were not statistically influenced on postoperative BCVA, even though in 4 cases with thicker CMT after surgery. Internal limiting membrane peeling (ILM) were enacted in 32 eyes. There was no statistically correlation between ILM peeling and postoperative BCVA. CMT was statistically significantly decreased (p<0.05) after ILM peeling, especially in flat pattern compared with other patterns (p<0.001).
These results revealed that postoperative changes in CMT and shape did not influence on final visual acuity in eyes underwent ERM surgery. So we do not need to concern about thickening of CMT and/or changing to any type of shape after ERM surgery.
This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.
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