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Tear lipid layer interference changes after dacryocystorhinostomy
1Department of Ophthalmology, Hirosaki University School of Medicine, Hirosaki, Japan.
Purpose:
Specular images of the tear film in the central cornea were examined in patients with nasolacrimal duct obstruction to observe changes before and after dacryocystorhinostomy (DCR).
Methods:
We observed the specular images in 4 patients (5 eyes) by a noncontact observation device and recording system. Observed patterns were classified into five grades. The specular images and tear meniscus height (TMH) were recorded.
Results:
Three of the 4 eyes with TMH values over 0.4 mm before DCR showed decreased TMH postoperatively. The 1 eye with a TMH value of 0.2 mm showed no change after DCR. Using specular images, 4 eyes were classified grade 1 or 2, and 1 eye was classified grade 4 before DCR. After DCR, the 5 eyes were classified as grade 3 or grade 4.
Conclusion:
The results indicated that the eye after DCR has a thicker lipid layer than the eye before DCR.