What is the main goal of dacryocystorhinostomy (DCR)?

The main goal of dacryocystorhinostomy (DCR) is to create an alternate route for tear drainage. This surgical procedure is performed when the nasolacrimal duct, which normally allows tears to drain from the eye into the nose, becomes obstructed. When this duct is blocked, it can lead to conditions such as excessive tearing (epiphora) and potential infections.

DCR works by forming a new passageway for tears to drain directly from the lacrimal sac into the nasal cavity, thereby alleviating the blockage. This is accomplished by creating a connection between the lacrimal sac and the nasal mucosa. As a result, the patient experiences improved tear drainage and relief from associated symptoms.

The other choices are unrelated to the primary objective of DCR. Eliminating glaucoma or reducing intraocular pressure involves different surgical techniques that focus on the drainage of fluid within the eye, while restoring vision pertains to addressing visual acuity issues, which DCR does not directly impact. Therefore, B is the correct and relevant choice in the context of this surgical procedure.