A millimetric ruler for Lester Jones tube placement in conjunctivodacryocystorhinostomy.

Purpose: To describe the use of a ruler to increase the accuracy and customization of Lester Jones tube placement.

Materials And Methods: This was a review of 92 patients who underwent minimally invasive conjunctivodacryocystorhinostomy using this instrument.

Results: The success rate was 100%, with an average operating time of 15 minutes.