Journal of Clinical and Experimental Ophthalmology
Open Access

Improvement of visual field following successful trabeculectomy is related to preoperative mean deviation

18^th Joint event on European Ophthalmology Congress & Ocular Pharamacology

December 04-06, 2017 | Rome, Italy

Magdalene Yin Lin Ting, George Yu Xiang Kong and Keith Martin

Cambridge University, UK
Centre for Eye Research Australia, Australia

Posters & Accepted Abstracts: J Clin Exp Ophthalmol

Abstract :

Background: Despite surgery, glaucomatous optic nerve dysfunction is believed to be permanent. Recent studies showed mixed results of visual field (VF) threshold sensitivity changes post-trabeculectomy. Aims & Objectives: The aim and objective of this study was to investigates VF improvement following successful trabeculectomy and relationships with disease factors. Methods: The Trabeculectomy group included consecutive cases of successful trabeculectomy surgeries from December 2011 to February 2016, giving 67 eyes. All had a Humphrey Field Analyser (HFA) 24-2 SITA Standard VF on the wait-listing day and postoperative 24-2 SITA Standard VFs. The control group consisted of 72 randomly-selected patients attending clinic without changes in IOP management. Results: Overall Mean Deviation (MD) for Trabeculectomy group was insignificantly changed by surgery (-8.2�±5.0dB preoperative vs. -8.7�±5.8dB post-operative, p=0.14), however change in MD for Trabeculectomy group (��=+0.5�±2.5dB) is better than Control group (��=-0.4�±1.4dB, p=0.03). For Trabeculectomy group, changes in MD values were not associated with preoperative IOP, magnitude of IOP reduction, or change in visual acuity. Interestingly, there was a near-linear relationship between change in MD and preoperative MD (R=0.49). There was a tendency for eyes with mild preoperative MD (> -6.0dB) to have worsened MD postoperatively (��=-0.83�±1.67dB) compared to an improvement in MD for eyes with moderate MD (-12.0dB