Abstract
We aimed to investigate the possible causes of metamorphopsia for rhegmatogenous retinal detachment (RRD) based on findings of enface optical coherence tomography (OCT). The study was a retrospective, consecutive case series of 33 eyes with macula-off RRD. Metamorphopsia was measured by M-CHARTS and enface OCT images covering a macular area of 6 × 6 mm square obtained at 1, 3, and 6 months postoperatively. Within the outer retinal slabs of enface OCT, multiple lines that looked like folds were delineated in all eyes at month 1, and we succeeded in extracting images of folds by subtracting retinal vessels. We calculated their density by an image-processing technique. The mean M-CHARTS scores were 0.62 ± 0.47 at month 1 and 0.30 ± 0.29 at month 6 (P < 0.001). The fold density was 8.3 ± 4.2 at month 1 and 6.1 ± 3.1 at month 6 (P = 0.0044). The M-CHARTS scores at 6 months were significantly associated with the fold density at 1 month (r = 0.515, P = 0.002). In conclusion, enface OCT visualized the outer retinal folds in eyes that had undergone successful RRD surgery, and a larger number of folds was related to the remaining metamorphopsia.
Highlights
Rhegmatogenous retinal detachment (RRD) is caused by one or more breaks in the retina, resulting in fluid from the vitreous cavity accumulating between the neurosensory retina and the retinal pigment epithelium
Previous studies have indicated the relationship between lesser improvement of visual acuity and morphological abnormalities of the retina on the basis of cross-sectional optical coherence tomography (OCT) findings after rhegmatogenous retinal detachment (RRD) repair, but OCT abnormalities relating to postoperative metamorphopsia have not been fully investigated[12,15,16]
Dell’Omo et al suggested that outer retinal folds seen on cross-sectional OCT after repair of RRD could be associated with persistent metamorphopsia[17,18]
Summary
Rhegmatogenous retinal detachment (RRD) is caused by one or more breaks in the retina, resulting in fluid from the vitreous cavity accumulating between the neurosensory retina and the retinal pigment epithelium. Previous studies have indicated the relationship between lesser improvement of visual acuity and morphological abnormalities of the retina on the basis of cross-sectional optical coherence tomography (OCT) findings after RRD repair, but OCT abnormalities relating to postoperative metamorphopsia have not been fully investigated[12,15,16]. Dell’Omo et al suggested that outer retinal folds seen on cross-sectional OCT after repair of RRD could be associated with persistent metamorphopsia[17,18]. Advantages of enface OCT imaging of outer retinal pathologies have been demonstrated in the management of age-related macular degeneration[19]. The purpose of this study was to assess microstructural changes within the outer retina on enface OCT images after RRD repair and to investigate their relationship to metamorphopsia
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