The effect of trabeculectomy and deep sclerectomy on the choroidal thickness: a comparative study

Purpose The aim of this study was to compare the changes in subfoveal choroidal thickness (SFCT) following trabeculectomy and nonpenetrating deep sclerectomy (NPDS) in cases with primary open-angle glaucoma (POAG). Patients and methods This is a prospective interventional comparative randomized study that was carried out on 42 eyes of 32 patients with chronic POAG who were divided into two groups: group A included 22 eyes that underwent trabeculectomy, and group B included 20 eyes that underwent NPDS. SFCT was measured preoperatively and was repeated on the third day and at 1 month postoperatively using spectral domain optical coherence tomography. Results In group A, there was a statistically significant increase in the SFCT on the third postoperative day and after 1 month, with a mean value of 42.86±38.08 and 28.5±27.91 μm, respectively, when compared with the preoperative SFCT (P