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Clinical Significance of Computerized Videokeratoscopic Indices for Dry Eye
건성안에서 비디오각막경검사 지표의 임상 유의성
JKOS 2019 Jul;60(7):627-34
Published online July 15, 2019;
Copyright © 2019 The Korean Ophthalmological Society.
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Jong-Ha Lee, MD, Min-Hwan Kim, MD, Byung-Yi Ko, MD, PhD

Department of Ophthalmology, Konyang University College of Medicine, Daejeon, Korea
건양대학교 의과대학 안과학교실
Received December 27, 2018; Revised March 26, 2019; Accepted June 25, 2019.
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License ( which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
Purpose: We evaluated the usefulness of the Tomey TMS-4N™ computerized videokeratoscopy (Tomey, Nagoya, Japan) for dry eye by analyzing the correlation between the regularity indices of TMS-4N™ and conventional dry eye parameters or dry eye severity.
Methods: In this retrospective study, the medical records of 193 dry eye patients (386 eyes) were analyzed. The regularity indices of TMS-4N™ such as the surface asymmetry index (SAI), surface regularity index (SRI), potential visual acuity (PVA), and irregular astigmatism index (IAI) were compared with conventional dry eye parameters (corrected visual acuity [CVA], ocular surface disease index [OSDI] score, tear film break-up time [TBUT], corneal staining score [CFS], and Schirmer’s I test). We also analyzed correlations between the regularity indices of TMS-4N™ and dry eye severity according to the Korean Corneal Disease Study Group.
Results: The regularity indices of TMS-4N™ such as SAI, SRI, PVA, and IAI increased according to the severity of dry eye. The regularity indices correlated significantly and positively with the CVA and CFS, but were significantly and negatively correlated with the TBUT. The OSDI score did not correlate with the regularity indices.
Conclusions: The regularity indices of TMS-4N™ provide an objective method for follow-up as well as a means to measure the severity of dry eye disease.
Keywords : Dry eye, Regularity indices, Videokeratoscopy


December 2019, 60 (12)