Emerging applications of intraoperative and portable optical coherence tomography in glaucoma: a review of recent advances

Glaucoma remains one of the leading causes of irreversible blindness worldwide with 80 million people affected and 3 million people blind from glaucoma [1] . Early diagnosis is critical for sight preservation and imaging modalities such as optical coherence tomography assist with the identification and quantification of glaucomatous changes. While widely used in the clinical setting, optical coherence tomography (OCT) has only more recently been optimized for use intraoperatively, in both portable and microscope-integrated forms. Intraoperative OCT (iOCT) provides visualization of both anterior and posterior structures in the eye. Gaining prominence in corneal and vitreoretinal surgery, iOCT has been shown to enhance surgical decision-making and improve outcomes in these fields. In glaucoma, iOCT has uses during tube shunt placement, minimally invasive glaucoma surgery, and trabeculectomy. This review highlights recent updates in iOCT use for glaucoma surgery.