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TitreSurgically induced corneal astigmatism after fornix-based trabeculectomy
Abstract Nr.1035
ButTo evaluate the degree of surgically induced corneal astigmatism (SIA) following trabeculectomy and to investigate the relation of SIA with long-term reduction of intraocular pressure (IOP).
MéthodesFourty-four eyes of 44 patients undergoing fornix-based trabeculectomy were included in this single center, prospective trial. IOP, visual acuity (VA), corneal astigmatism, medication use and adverse events were recorded preoperatively and at 1, 3, 6 and 18 months postoperatively. Changes in corneal astigmatism were analysed using vector analysis. Pre- and postoperative parameters were compaired using one-sample t-test. Correlation between SIA and IOP were assessed using Pearson correlation coefficients.
RésultatsVector analysis of corneal astigmatism revealed a significant increase in with-the-rule corneal astigmatism, reaching a maximum at 1 month postoperatively (1.15 ± 0.8 D, P<0.001) followed by a gradual decline (0.87 ± 0.8 D, P <0.001 at month 18). SIA at 1 month showed a borderline significant correlation with IOP reduction at 3 months (r=0.315, P = 0.051). SIA at 3,6 and 18 months did not correlate with reduction in IOP (P>0.05). After a transient decline at 1 month after surgery, VA recovered to preoperative values at month 3 without need for adjustment of the optical correction.
ConclusionFornix-based trabeculectomy induces statistically significant with-the-rule astigmatism without affecting long term VA. In our population, maximum SIA, measured at 1 month postoperatively, showed a borderline significant correlation with reduction of IOP at 3 months postoperatively.
Auteur 1
NomVAN KEER
InitialesK
InstitutUZ Leuven
VilleLeuven
Auteur 2
NomWillekens
InitialesK
InstitutUZ Leuven
VilleLeuven
Auteur 3
NomAbegão Pinto
InitialesL
InstitutFaculty of Medicine of Lisbon University
VilleLisbon
Auteur 4
NomDelbeke
InitialesH
InstitutUZ Leuven
VilleLeuven
Auteur 5
NomVandewalle
InitialesE
InstitutUZ Leuven
VilleLeuven
Auteur 6
NomStalmans
InitialesI
InstitutUZ Leuven
VilleLeuven
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