Preoperative Clinical Examinations and results of Trabeculectomy Two Yearsafter the Operation

Summary

Purpose:
To determine whether preoperative anatomical and functional resultshave an influence on the postoperative decreas in intraocular pressure (IOP) andtherapy two years after trabeculectomy (TE).Methods: In a retrospective study 40 patients (80 eyes) with primary open angleglaucoma were followed. They underwent TE with two releasable sutures on botheyes performed by the same method and the same surgeon. The preoperative andpostoperative levels ofIOP(asmeasuredbytheGoldmanntonometer)andtherapy(according to target pressure) were compared with preoperative gonioscopy(Shaffer’s scale 0–4), the excavation of the optic nerve (c/d ratio) and preoperativeresults of the visual field (threshold tests and Aulhorn’s classification 0–V).Results: The preoperative size of the angle of the anterior chamber has noexpressive influence on the postoperative decreas in IOP (p=0.079), there is aneven smaller influence on decreas on therapy (p=0.619). As well the preoperativeexcavation of the optic disc had no influence on the postoperative decreas in IOP(p=0.179) and therapy (p=0.467). There is an analogy with the visual fields; preoperativechanges had no influence on the postoperative decrease IOP (p=0.502)and therapy (p=0.247).Conclusion: Preoperative anatomical and functional status had no the influenceon the success of TE.

Key words:
c/d ratio, glaucoma, gonioscopy, intraocular pressure, therapy, trabeculectomy,visual field