Macular morphologic changes following successful retinal detachment repair by scleral buckling surgery

Background/Aim. Spectral domain optical coherence tomography (SDOCT) is very useful for the accurate exam-ination of macular microstructure. The aim of this study was to evaluate macular morphologic changes after suc-cessful retinal detachment (RD) surgery by scleral buckling (SB) using SDOCT and assess their impact on vision re-pair. Methods. SDOCT examination was performed in 1, 6, and 12 months in 27 eyes following SB surgery with the successful anatomical repair of rhegmatogenous RD, which also affected the macular region. The examination was per-formed in a 6 mm diameter central macular region and in-cluded measurements of the central foveal thickness, aver-age total retinal thickness (TRT), and thickness of the inner and outer retinal layer (ORT) separately. The numerical values of parameters for each operated eye were compared with those of the fellow (control) eye of each patient. The condition of the external limiting membrane (ELM) and inner segment (IS) and outer segment (OS) of the photore-ceptors was also examined. Results. The mean TRT and ORT in the reattached regions in the operated eyes were significantly thinner than the corresponding regions of the fellow (control) eye, and throughout the follow-up period, the difference was statistically significant. There was a sta-tistically significant difference in TRT (after 1 month, p = 0.021, after 6 months, p = 0.026, after 12 months, p = 0.027) and ORT (after 1 month, p = 0.018, after 6 months, p = 0.019, after 12 months, p = 0.021) between the eyes with a longer preoperative duration of macular detachment (MD) of 2 weeks and eyes with shorter detachment period. Disruptions of the IS and OS of photoreceptors and ELM on SDOCT examination after one month were observed in 37.04% of eyes, after 6 months in 29.6% of eyes, and at the end of the follow-up period in 14.8% of eyes. A statistically significant difference was found in the frequency of disrup-tions of the IS and OS, and ELM depending on the pre-operative duration of RD (p = 0.007). Conclusion. The overall decrease in the mean retinal thickness after success-ful anatomical repair of RD is the result of a decrease in the thickness of the outer retinal layers. The alterations of the ELM, IS and OS of photoreceptors observed on the early SDOCT scans are mostly associated with limited vi-sion recovery. The prolonged MD leads to damaging the neurosensory tissue of the retina and especially the photo-receptors, which may explain the limited visual acuity re-covery after successful SB repair of RD.