LONG-TERM OUTCOMES OF RADIAL OPTIC NEUROTOMY FOR MANAGEMENT OF OPTIC DISK PIT MACULOPATHY.

PURPOSE

To evaluate the long-term outcomes of radial optic neurotomy (RON) in patients with optic disk pit maculopathy and to compare the functional and anatomical outcomes of pars plana vitrectomy (PPV) with temporal side single RON versus PPV without RON.

METHODS

This retrospective study included 15 eyes of 15 consecutive patients who had surgery for optic disk pit maculopathy. Patients were followed for 12 to 115 months after surgery. Anatomical and functional results were evaluated with optical coherence tomography, MP-1 microperimetry in the central 20°, and measurement of best-corrected visual acuity. Descriptive statistical methods, Friedman chi-square test, post hoc Dunn test, Mann-Whitney test, Wilcoxon signed-rank test, and Fisher's exact test were used to determine the best-corrected visual acuity and MP-1 microperimetry differences between time points and to compare the results between the two treatment groups.

RESULTS

Two male and 5 female patients with a mean age 23.3 ± 8.7 (±standard error) years at presentation had PPV and silicone oil or gas tamponade with RON. Best-corrected visual acuity did not deteriorate after the operation in any of the eyes, and improved in 6 (86%) eyes (3 ± 2 lines). After surgery, complete resolution of fluid in the central macula was observed in 6 (86%) eyes. Five male and 3 female patients with a mean age 28.2 ± 8.2 years at presentation had PPV, posterior vitreous detachment, with or without juxtapapillary laser treatment, and silicone oil or gas tamponade. Best-corrected visual acuity did not deteriorate after the operation in any of the eyes, and improved in 5 (62.5%) eyes (2 ± 0.7 lines). After surgery, fluid in the central macula resolved completely in 4 (50%) eyes.

CONCLUSION

Pars plana vitrectomy with temporal side, single RON seems to be an effective method of managing optic disk pit maculopathy. The anatomical and functional improvements, without additional treatment or complication during the follow-up period, indicate that RON might be an alternative treatment approach to PPV alone for optic disk pit maculopathy.