A lacrimal intubation set is a medical device used in ophthalmology to treat conditions such as nasolacrimal duct obstruction. The nasolacrimal duct is a passage that allows tears to drain from the eye into the nasal cavity. When this duct becomes blocked, it can lead to excessive tearing, discomfort, and sometimes infection. The lacrimal intubation set typically includes thin, flexible tubes (intubation catheters) and instruments designed to insert these tubes into the nasolacrimal duct to clear the obstruction. The procedure involves threading the catheter through the tear duct to open it up and establish proper drainage.