Ritleng® intubation system consists of a silicone (or PVP) tube connected at each extremity to a Poly Ether Ether Ketone (PEEK) thread guide to reduce time and trauma in lacrimal duct intubation surgery. The procedure involves inserting the hollow Ritleng® Probe into the nasolacrimal duct and feeding the thin PEEK thread through it. The probe is then withdrawn, leaving the PEEK to pull the silicone tubing into place.