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CO2 laser-assisted sclerectomy surgery vs trabeculectomy: one year results

Poster Details

First Author: P.Faria PORTUGAL

Co Author(s):    M. Marques   M. Raimundo   J. Cardoso   J. Silva   J. Moura Pereira   J. Murta     

Abstract Details


To compare the efficacy and safety of CO2 Laser-Assisted Sclerectomy Surgery (CLASS) and Cairns Trabeculectomy (TRAB) in patients with open angle glaucoma, after one year of follow-up.


Department of Ophthalmology, Centro Hospitalar e Universit�Ã�¡rio de Coimbra �â�€�“ CHUC, Coimbra, Portugal.


Retrospective case series including consecutive patients with primary or pseudoexfoliative open angle glaucoma, elected for filtration surgery. All included participants underwent a complete ophthalmological exam. The best corrected visual acuity (BCVA), intraocular pressure (IOP) and number of antiglaucoma medications were documented at baseline and at all postoperative clinic visits (1 and 3 weeks and 1, 2, 3, 6 and 12 months). Complete success was defined as an intraocular pressure (IOP) ranging from 5-20mmHg or decreased by �â�‰�¥30% after 3 months of follow-up with no adjuvant therapies. Qualified success was defined with the same criteria including adjuvant therapies.


Thirty-seven eyes from 37 patients who undergone either CLASS (n=17) or TRAB (n=20) were included. Both groups were matched for age, IOP and antihypertensive medication. Three cases of hyphema and one shallow anterior chamber were registered in the TRAB group. Seven needlings and two goniopunctures were required in the TRAB and CLASS groups, respectively. A similar mean IOP reduction (p=0.904) and similar mean reduction in the number of eyedrops (p=0.549) were verified on both groups. In the CLASS group a complete success was achieved in 55.6% of cases (vs. 50%) and a qualified success in 88.2% (vs. 95%).


We present the one-year results of a study comparing CO2 Laser-Assisted Sclerectomy Surgery and trabeculectomy. The CLASS technique yielded a similar efficacy when compared to TRAB, plus a higher rate of complete success with less procedure-related adverse events.

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