Journal of Clinical and Experimental Ophthalmology
Open Access
ISSN: 2155-9570
ISSN: 2155-9570
Magdalene Yin Lin, Ting, George Yu Xiang, Kong, and Keith Martin
Cambridge University NHS Trust, UK
Centre for Eye Research Australia, Australia
Scientific Tracks Abstracts: J Clin Exp Ophthalmol
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 and Objectives: This study 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 pre-operative 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 < MD â�¤ -6.0dB, ��=+0.62�±2.11dB), severe MD (-20.0dB Magdalene Yin Lin is currently a year 5 medical student at Trinity Hall, University of Cambridge, UKBiography :