Author:
Gustafsson Ingemar,Bizios Dimitrios,Ivarsen Anders,Hjortdal Jesper Ø
Abstract
Abstract
Background
To investigate whether the repeatability of measurements with the Pentacam HR in patients with keratoconus is improved by patients gaining more experience of the measurement situation. Such an improvement could enhance the accuracy with which progressive keratoconus can be detected.
Methods
Four replicate measurements were performed on Day 0 and on Day 3. Parameters commonly used in the diagnosis of progressive keratoconus were included in the analysis, namely the flattest central keratometry value (K1), the steepest central keratometry value (K2), the maximum keratometry value (Kmax), and the parameters A, B and C from the Belin ABCD Progression Display. In addition, quality parameters used by the Pentacam HR to assess the quality of the measurements were included, namely the analysed area (front + back), 3D (front + back), XY, Z, and eye movements.
Results
Neither the diagnostic parameters nor the quality parameters showed any statistically significant improvement on Day 3 compared to Day 0. The quality parameter “eye movements” deteriorated significantly with increasing Kmax.
Conclusion
Gaining experience of the measurement situation did not increase the accuracy of the measurements. Further investigations should be performed to determine whether the increasing number of eye movements with increasing disease severity has a negative effect on the repeatability of the measurements.
Publisher
Springer Science and Business Media LLC
Subject
Ophthalmology,General Medicine
Reference30 articles.
1. Ng SM, Ren M, Lindsley KB, Hawkins BS, Kuo IC. Transepithelial versus epithelium-off corneal crosslinking for progressive keratoconus. Cochrane Database Syst Rev. 2021;3(3):Cd013512.
2. Spörl E, Huhle M, Kasper M, Seiler T. Increased rigidity of the cornea caused by intrastromal cross-linking. Ophthalmologe. 1997;94(12):902–6.
3. Larkin DFP, Chowdhury K, Burr JM, Raynor M, Edwards M, Tuft SJ, et al. Effect of corneal cross-linking versus Standard Care on Keratoconus Progression in Young Patients: the KERALINK Randomized Controlled Trial. Ophthalmology. 2021;128(11):1516–26.
4. Raiskup F, Herber R, Lenk J, Ramm L, Wittig D, Pillunat LE, et al. Corneal crosslinking with Riboflavin and UVA Light in Progressive Keratoconus: fifteen-year results. Am J Ophthalmol. 2023;250:95–102.
5. Godefrooij DA, Gans R, Imhof SM, Wisse RP. Nationwide reduction in the number of corneal transplantations for keratoconus following the implementation of cross-linking. Acta Ophthalmol. 2016;94(7):675–8.