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Visual Outcomes of Pars Plana Vitrectomy with Epiretinal Membrane Peeling in Patients with Asteroid Hyalosis: A Matched Cohort Study.
Ophthalmic Research 2017
BACKGROUND: The study aimed to evaluate outcomes of epiretinal membrane (ERM) peeling in patients with asteroid hyalosis (AH) and to compare them with those from controls without AH.
METHODS: This is a retrospective matched cohort study of 1,104 consecutive patients who underwent surgery for ERM between January 2004 and February 2014. Patients with AH were included in the study group and were matched for preoperative visual acuity, age, gender, date of surgery, and axial length with control patients without AH selected from the same cohort. The best-corrected visual acuity (BCVA) and central macular thickness (CMT) on optical coherence tomography were measured at baseline and postoperatively with a minimum follow-up period of 12 months.
RESULTS: A total of 44 patients were included in the AH group and 44 in the control group. The mean initial BCVA was 0.53 ± 0.21 LogMAR for the AH group vs. 0.49 ± 0.20 LogMAR for the control group, and the mean initial CMT was 419 ± 74 vs. 423 ± 75 µm, respectively. During the follow-up, no significant difference was found regarding the final BCVA at 6 months (0.23 ± 0.14 vs. 0.24 ± 0.17) LogMAR (p = 0.87) and 12 months (0.16 ± 0.09 vs. 0.17 ± 0.12) LogMAR (p = 0.92), despite a tendency toward slower visual recovery for the AH group at 1 month, with a mean BCVA of 0.36 ± 0.12 vs. 0.28 ± 0.18 LogMAR (p = 0.08). No difference was found regarding the progression of CMT at 1.6 and 12 months with a mean CMT of 396 ± 47 vs. 378 ± 55 µm (p = 0.39), 356 ± 39 vs. 365 ± 41 µm (p = 0.48), and 349 ± 68 vs. 352 ± 53 µm (p = 0.87), respectively.
CONCLUSION: Vitrectomy with ERM peeling in patients with AH was beneficial and showed similar functional and anatomical outcomes in both groups. AH does not seem to affect visual improvement or the complication rate after ERM peeling. Therefore, the indications for vitrectomy in case of ERM should not be prompted by the presence of AH.
METHODS: This is a retrospective matched cohort study of 1,104 consecutive patients who underwent surgery for ERM between January 2004 and February 2014. Patients with AH were included in the study group and were matched for preoperative visual acuity, age, gender, date of surgery, and axial length with control patients without AH selected from the same cohort. The best-corrected visual acuity (BCVA) and central macular thickness (CMT) on optical coherence tomography were measured at baseline and postoperatively with a minimum follow-up period of 12 months.
RESULTS: A total of 44 patients were included in the AH group and 44 in the control group. The mean initial BCVA was 0.53 ± 0.21 LogMAR for the AH group vs. 0.49 ± 0.20 LogMAR for the control group, and the mean initial CMT was 419 ± 74 vs. 423 ± 75 µm, respectively. During the follow-up, no significant difference was found regarding the final BCVA at 6 months (0.23 ± 0.14 vs. 0.24 ± 0.17) LogMAR (p = 0.87) and 12 months (0.16 ± 0.09 vs. 0.17 ± 0.12) LogMAR (p = 0.92), despite a tendency toward slower visual recovery for the AH group at 1 month, with a mean BCVA of 0.36 ± 0.12 vs. 0.28 ± 0.18 LogMAR (p = 0.08). No difference was found regarding the progression of CMT at 1.6 and 12 months with a mean CMT of 396 ± 47 vs. 378 ± 55 µm (p = 0.39), 356 ± 39 vs. 365 ± 41 µm (p = 0.48), and 349 ± 68 vs. 352 ± 53 µm (p = 0.87), respectively.
CONCLUSION: Vitrectomy with ERM peeling in patients with AH was beneficial and showed similar functional and anatomical outcomes in both groups. AH does not seem to affect visual improvement or the complication rate after ERM peeling. Therefore, the indications for vitrectomy in case of ERM should not be prompted by the presence of AH.
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