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Dacryoendoscopy offers precise visualization for epiphora management, improving diagnosis and minimally invasive treatment. This technique has evolved significantly, shifting towards anatomy-based care and conservative surgical approaches.

Keywords:
Bent probe dacryoendoscopedacryoendoscopyduct lumen remnantfalse passage classificationminimally invasive lacrimal surgery

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Area of Science:

  • Ophthalmology
  • Surgical Innovation
  • Medical Device Technology

Background:

  • Epiphora management has historically faced challenges with diagnostic accuracy and treatment invasiveness.
  • Dacryoendoscopy has evolved over 30 years, enhancing understanding of lacrimal outflow pathology.
  • A paradigm shift from blind intervention to anatomy-based diagnosis and management is evident in lacrimal surgery.

Purpose of the Study:

  • To review the evolution, device philosophy, and clinical applications of dacryoendoscopy.
  • To highlight the contributions of the Bent group and the rise of conservative minimally invasive lacrimal surgery.
  • To discuss techniques and challenges in dacryoendoscopy for nasolacrimal duct obstruction.

Main Methods:

  • Narrative review of relevant literature.
  • Nonsystematic search of PubMed and Ichushi-Web (1995-2025).
  • Keywords: dacryoendoscopy, nasolacrimal duct, false passage.

Main Results:

  • Dacryoendoscopy enhances diagnostic precision and enables minimally invasive treatment for epiphora.
  • Bent probe endoscopes are widely used, particularly in Asia.
  • Techniques like sheath-guided probing and intubation were reviewed, with false passage identified as a complication.

Conclusions:

  • Dacryoendoscopy represents a significant advancement in lacrimal surgery, emphasizing visualization before intervention.
  • Conservative, mucosa-preserving techniques are emerging, especially for pediatric cases.
  • Long-term outcome deterioration and mucosal regeneration remain challenges in dacryoendoscopy.