AIM: To analyze the influence and safety of KTP laser combined with drainage tube implantation for lacrimal duct obstruction patients.

METHODS: Totally 200 patients(200 eyes)randomly selected from June 2012 to September 2015 in our hospital was diagnosed with lacrimal duct obstruction and treated with KTP laser combined drainage tube implantation. The ocular surface condition, including tear break-up time, fern-like crystals, dry eye symptoms questionnaire, lissamine green staining, corneal fluorescein staining, were assessed before and 1mo after surgery.

RESULTS: At 1mo after surgery, the tear secretion increased significantly. After extubation, tear secretion decreased significantly compared to the preoperative(P<0.05). The results of the questionnaire showed that the symptoms improved significantly after surgery. There were no significant differences between tear break-up time, fern-like crystals and conjunctival goblet cells before and after surgery, or after extubation.

CONCLUSION: KTP laser combined with drainage tube implantation can improve the symptoms and quality of life for lacrimal duct obstruction patients.