Macular hole angle as a surgery prognostic factor

PurposeTo analyze pre‐surgical macular hole (MH) angle measured by spectral domain optical coherence tomography (SD‐OCT) and its influence on anatomical and visual outcomes of macular hole surgeryMethodsA retrospective observational study of 37 eyes, with idiopathic MH, of 37 patients was conducted between 2013 January 1st and 2014 December 31st. Temporal and nasal angles of the macular holes were measured as the angle between RPE and the retinal edge. Angles were measured using a protractor directly on the screen of the SD‐OCT machine. For statistical analysis, the approximate average angle of the macular hole was estimated through the average between the temporal and nasal angle of each eye. Besides medium MH angle, other parameters were considered, including minimum hole diameter; hole base diameter; hole height and presence of cystic edges. Several MH indices, such as Macular Hole Index, Tractional Hole Index and Diameter Hole Index, were calculated. Separate multivariate regressions for the dependent variables final best corrected visual acuity and anatomical closure were performed to analyze their associations with SD‐OCT parameters as independent variables.ResultsMedian average angle was 43.5 (35.0–45.5) degrees. Multivariate analysis showed that average angle did not significantly correlated to anatomical closure and final visual acuity, in contrast to hole base diameter and hole height that significantly correlated to final visual acuity.ConclusionsOur study demonstrates that MH angle did not correlate to anatomical or visual outcome after MH repair surgery.