Recent studies involving continuous, 24-hour intraocular pressure (IOP) monitoring in glaucoma patients linked IOP variation to disease progression.~No study has previously compared the postoperative IOP variation of microshunt (Preserflo, P) implantation to ab interno trabeculectomy (Trabectome, T).~In this prospective cohort, the investigators analyzed 68 patients (34 P and 34 T) who presented for 24-hour IOP monitoring 6 to 12 months after surgery. Surgery must have been conducted between October 2020 and July 2021. Patients were assigned to each study group according to the intervention undergone, P or T. IOP and tonographic outflow facility were measured in the habitual position using a pneumatonometer. The IOP variation was considered the primary outcome measure.
The purpose of this study was to asses differences in nycthemeral (24-h) intraocular pressure (IOP) profiles and outflow facilities between patients who have undergone epibulbar microshunt implantation and ab interno trabeculectomy, respectively.