RESEARCH ARTICLE Open Access Pre-operative intraocular p

nd modifiable risk factor proven to influence the pro-gression of glaucoma. If medical management is not suc-[4,5]. Although most patients undergoing trabeculec-tomy surgery have elevated IOP, a significant propor-Nesaratnam et al. BMC Ophthalmology (2015) 15:17 DOI 10.1186/s12886-015-0007-1CB2 0QQ, UK Full list of author information is available at the end of the articlecessful in controlling IOP, surgical intervention may be required. The commonest surgical procedure performed for glaucoma worldwide is trabeculectomy [1,2]. Trabe-culectomy is performed for many types of glaucoma, in-cluding situations where there is progressive glaucoma despite a relatively low IOP [3]. Long-term follow-up tion of patients have never had a documented IOP over 21 mmHg. In general, a lesser percentage reduction i