September 2016
Volume 57, Issue 12
Open Access
ARVO Annual Meeting Abstract  |   September 2016
A multicenter randomized controlled trial comparing phacoemulsification with intraocular lens implantation alone (phaco/IOL) versus phaco/IOL with goniosynechialysis (GSL) in patients with primary angle closure disease (PACD) and cataract.
Author Affiliations & Notes
  • Rahat Husain
    Glaucoma, Singapore national Eye Centre, Singapore, Singapore
    Singapore Eye Research institute, Singapore, Singapore
  • Do Tan
    Vietnam National institute of Ophthalmology, Hanoi, Viet Nam
  • Jimmy Shiu Ming Lai
    University of Hong Kong, Hong Kong, Hong Kong
  • Naris Kitnarong
    Siriraj Hospital, Mahidol University, Bangkok, Thailand
  • Monisha Esther Nongpiur
    Singapore Eye Research institute, Singapore, Singapore
  • Shamira Perera
    Glaucoma, Singapore national Eye Centre, Singapore, Singapore
    Singapore Eye Research institute, Singapore, Singapore
  • Ching Lin Lin Ho
    Glaucoma, Singapore national Eye Centre, Singapore, Singapore
    Singapore Eye Research institute, Singapore, Singapore
  • K Sheng Lim
    Guys' and St Thomas' NHS Foundation Trust, London, United Kingdom
  • Tin Aung
    Glaucoma, Singapore national Eye Centre, Singapore, Singapore
    Singapore Eye Research institute, Singapore, Singapore
  • Footnotes
    Commercial Relationships   Rahat Husain, None; Do Tan, None; Jimmy Lai, None; Naris Kitnarong, Alcon (R), Allergan (R), AMO (R), Santen (R); Monisha Nongpiur, None; Shamira Perera, Alcon, Ellex (R), Allergan (C), Ivantis (F); Ching Lin Ho, Alcon (R), Allergan (R), Santen (F); K Sheng Lim, Alcon (R), Allergan (R), EyeHope (F), Fight for Sight (F), Istar, Ivantis (C), NIHR (F), St Thomas' charity (F), Thea (F), Thea (R); Tin Aung, None
  • Footnotes
    Support  Singapore National Medical Research Council R221/13/2001
Investigative Ophthalmology & Visual Science September 2016, Vol.57, 6520. doi:
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      Rahat Husain, Do Tan, Jimmy Shiu Ming Lai, Naris Kitnarong, Monisha Esther Nongpiur, Shamira Perera, Ching Lin Lin Ho, K Sheng Lim, Tin Aung; A multicenter randomized controlled trial comparing phacoemulsification with intraocular lens implantation alone (phaco/IOL) versus phaco/IOL with goniosynechialysis (GSL) in patients with primary angle closure disease (PACD) and cataract.. Invest. Ophthalmol. Vis. Sci. 2016;57(12):6520.

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      © ARVO (1962-2015); The Authors (2016-present)

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Abstract

Purpose : Both phaco/IOL and phaco/IOL + GSL have been shown to lower intraocular pressure (IOP) in patients with PACD. We conducted a trial to determine which of these procedures is more effective in lowering IOP at 1 year.

Methods : Patients were recruited from Singapore, Vietnam, Hong Kong and Thailand. Those with PACD, IOP>21mmHg (or on IOP lowering medication), cataract and at least one quadrant of peripheral anterior synechiae (PAS) were randomly assigned to one of 2 treatment groups; phaco/IOL or phaco/IOL + GSL. GSL was performed after implantation of the intraocular lens using a direct gonioscopic lens and blunt spatula, and all PAS visible at the time of surgery was broken. Post-operative IOP medication was only allowed if IOP >21mmHg on 2 consecutive visits, excluding the first week. Success was defined as IOP ≤ 21mmHg without IOP lowering medication, and a decrease in IOP of ≥ 80% of baseline IOP, at 1 year. Chi-square or Fishers exact test statistical tests were used as appropriate to compare success between the 2 groups.

Results : 40 eyes were randomized into the phaco/IOL group and 42 to the phaco/IOL + GSL group. The mean age was 64.7 ± 8.6 and 64.4 ± 9.1 (p=0.87) respectively. There were 71 patients who reached 1 year follow up (36 in the phaco/IOL group). IOP was significantly lowered in both groups (by 27.0 ± 38.9% in the phaco/IOL and 27.6 ± 22.9% in the phaco/IOL + GSL group (p=0.45) compared to baseline IOP. Success was achieved in 16/36 (48.5%) in the phaco/IOL group and 21/34 (61.8%) in the phaco/IOL + GSL group (p=0.27). Multivariate logistic regression analysis found that only higher baseline IOP was significantly associated with success. There were no significant intra- or post-operative complications in either group.

Conclusions : Both procedures were safe and achieved similar percentage reductions in IOP at 1 year. Success at one year was not significantly different between the groups. There is no significant advantage in performing concurrent GSL for patients with PACD undergoing phaco/IOL.

This is an abstract that was submitted for the 2016 ARVO Annual Meeting, held in Seattle, Wash., May 1-5, 2016.

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