Associations between the Munk Score and Tear Film Scan Revealed byCorneal Topography after Dacryocystorhinostomy
10.3341/jkos.2020.61.4.325
- Author:
Se Young KIM
1
;
Na Rae KIM
;
Ji Won JUNG
;
Sung Mo KANG
Author Information
1. Department of Ophthalmology, Inha University College of Medicine, Incheon, Korea
- Publication Type:Original Article
- From:Journal of the Korean Ophthalmological Society
2020;61(4):325-333
- CountryRepublic of Korea
-
Abstract:
Purpose:We evaluated changes in the tear film parameters of the corneal surface, and their correlations with Munk scores,based on corneal topographic scans of patients with nasolacrimal duct obstructions who underwent dacryocystorhinostomy(DCR). We explored whether tear parameters can serve as useful indicators of functional surgical success.
Methods:We assessed 72 eyes of 45 patients diagnosed with nasolacrimal duct obstruction who underwent DCR. Tear film parameterswere measured via corneal topography (Keratograph® 5M) once before, and three times after surgery, and includedtear meniscus height (TMH), and the initial and average keratographic tear break-up time (NIKBUT-first and NIKBUT-average,respectively; measured noninvasively).
Results:The three postoperative TMH values were 0.31 ± 0.20, 0.30 ± 0.22, and 0.29 ± 0.15 mm, all of which were significantlylower than the preoperative value of 0.48 ± 0.29 mm (all, p < 0.001). Three months after surgery, the NIKBUT-first (6.90 ± 3.39seconds) was significantly shorter than the preoperative value (8.39 ± 5.34 seconds; p = 0.030). The preoperative NIKBUT-averagedid not differ significantly from the values at the three postoperative timepoints (p = 0.756, p = 0.753, and p > 0.999).Changes in the Munk score after surgery correlated significantly with changes in the TMH (r = 0.46, p < 0.001). When functionalsuccess was defined as a Munk score ≤ 1, the area under the curve (AUC) value corresponding to the ability of TMH to definefunctional success of 0.995, was statistically significant (cut-off of 0.31 mm; p < 0.001).
Conclusions:The TMH DCR correlated significantly with the Munk score, which is a quantitative measure of clinical symptomseverity. The ability of TMH to define functional surgical success was excellent.
