Assessment of Tear Meniscus Changes Before and After Dacryocystorhinostomy Using Anterior Segment Optical Coherence Tomography

Abstract

rimary acquired nasolacrimal duct obstruction (PANDLO) is the most common cause of lacrimal obstruction in adults and has the highest incidence in the fifth to sixth decades. [32] Dacryocystorhinostomy (DCR) is the procedure of choice for nasolacrimal duct obstruction. Two major approaches are utilized: external, via a transcutaneous incision, and endonasal endoscopically guided. This surgery has a high success rate via both approaches. [48] In treatment for obstruction of the lacrimal drainage system, tear meniscus (TM) is one of the most important clinical indices for therapeutic evaluation, which can be assessed with slit-lamp examination and fluorescein dye disappearance test as a semi quantitative measurement. However, it is obvious that all lacrimal functions are not of the same flow, and more sophisticated tests are needed to quantitate lacrimal function. [6]