1. Comparing pentacam HR screening indices in different normal corneal thicknesses among refractive surgery candidates
- Author
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Leila, Ghiasian, Parya, Abdolalizadeh, Ali, Hadavandkhani, Acieh, Eshaghi, Yasaman, Hadi, and Fatemeh, Nadjafi-Semnani
- Subjects
Ophthalmology - Abstract
To compare Pentacam indices in normal eyes with different corneal thicknesses.It is a retrospective observational study. Ninety-six normal eyes of 96 patients who were referred for refractive surgery in a tertiary university-based hospital from October 2015 to April 2019 were recruited consecutively. Corneal keratometry as well as Pentacam's software Belin-Ambrósio Enhanced Ectasia Display (BAD) parameters including pachymetry progression indices (PPIs), maximum Ambrosio's relational thickness (ART-max), corneal elevations, normalized deviations, BAD total deviation value (BAD-D), and anterior surface indices were measured by Pentacam HR (Type 70900). The included were classified as thin (26 eyes), average (45 eyes), and thick (25 eyes) corneas with the thinnest point thickness of ≤496 μm, 497-595 μm, and ≥596 μm, respectively. The specificities of all parameters were calculated based on routine cut-off values.The refraction, keratometry, and elevations were not different (The pachymetry-related indices and BAD-D were different among normal corneas with various thicknesses. The specificities of PPIs, ART-max, and BAD-D of thin corneas were lower than in thick corneas.
- Published
- 2022