title: Angle parameter changes of phacoemulsification and combined phacotrabeculectomy for acute primary angle closure.
abstract: OBJECTIVE
  To evaluate the difference in angle parameters and clinical outcome following phacoemulsification and combined phacotrabeculectomy in patients with acute primary angle closure (APAC) using ultrasound biomicroscopy (UBM).
  
  
  METHODS
  Patients (n=23, 31 eyes) were randomized to receive phacoemulsification or combined phacotrabeculectomy (n=24, 31 eyes). Best-corrected visual acuity (BCVA), intraocular pressure (IOP), the main complications following surgery, and indentation gonioscopy and angle parameters measured using UBM were documented preoperatively and postoperatively.
  
  
  RESULTS
  The improvement in BCVA in the phacoemulsification group was significantly greater than in the combined group (P<0.05). IOP in the phacoemulsification group was slightly higher than in the combined group following 1wk of follow-up (P<0.05), whereas there was no significant difference between the two groups at the latter follow-up (P>0.05). Phacoemulsification alone resulted in a slight increase in the trabecular ciliary processes distance compared with the combined surgery (P<0.05), whereas the other angle parameters showed no significant difference between the groups. Complications in combined group were greater than phacoemulsification only group.
  
  
  CONCLUSIONS
  Both surgeries effectively opened the drainage angle and deepened the anterior chamber, and IOP was well controlled postoperatively. However, phacoemulsification showed better efficacy in improving visual function and showed reduced complications following surgery.
authors: Department of Ophthalmology, the Sixth People's Hospital Affiliated of Shanghai Jiaotong University, Shanghai 200233, China.
authors: Shi-Wei
authors: SW
authors: Li
authors: Department of Ophthalmology, the Sixth People's Hospital Affiliated of Shanghai Jiaotong University, Shanghai 200233, China.
authors: Yan
authors: Y
authors: Chen
authors: Department of Ophthalmology, the Sixth People's Hospital Affiliated of Shanghai Jiaotong University, Shanghai 200233, China.
authors: Qiang
authors: Q
authors: Wu
authors: Department of Ophthalmology, the Sixth People's Hospital Affiliated of Shanghai Jiaotong University, Shanghai 200233, China.
authors: Bin
authors: B
authors: Lu
authors: Department of Ophthalmology, the Sixth People's Hospital Affiliated of Shanghai Jiaotong University, Shanghai 200233, China.
authors: Wen-Qing
authors: WQ
authors: Wang
authors: Department of Ophthalmology, the Sixth People's Hospital Affiliated of Shanghai Jiaotong University, Shanghai 200233, China.
authors: Jian
authors: J
authors: Fang
keywords: acute primary angle closure; cataract; phacoemulsification; phacotrabeculectomy