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Salouti R, Bagheri M, Shamsi A, Zamani M, Ghoreyshi M, Nowroozzadeh MH. Corneal Parameters in Healthy Subjects Assessed by Corvis ST. JOVR [Internet]. 2020Feb.3 [cited 2024Jun.30];15(1):24–31. Available from: https://knepublishing.com/index.php/JOVR/article/view/5936

https://doi.org/10.18502/jovr.v15i1.5936

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authors

  • Ramin Salouti

    Ramin Salouti

    Poostchi Ophthalmology Research Center, Department of Ophthalmology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran; Salouti Cornea Research Center, Salouti Eye Clinic, Shiraz, Iran
  • Mansoureh Bagheri

    Mansoureh Bagheri

    Poostchi Ophthalmology Research Center, Department of Ophthalmology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
  • Anis Shamsi

    Anis Shamsi

    Poostchi Ophthalmology Research Center, Department of Ophthalmology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
  • Mohammad Zamani

    Mohammad Zamani

    Salouti Cornea Research Center, Salouti Eye Clinic, Shiraz, Iran
  • Maryam Ghoreyshi

    Maryam Ghoreyshi

    Health Policy Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
  • M. Hossein Nowroozzadeh

    M. Hossein Nowroozzadeh

    Poostchi Ophthalmology Research Center, Department of Ophthalmology, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran

Published Date

  • Feb 3, 2020
This journal is publishing all the articles under Creative Commons Attribution License CC BY 4.0.

Corneal Parameters in Healthy Subjects Assessed by Corvis ST

Journal of Ophthalmic and Vision Research (JOVR) / January–March 2020, Volume 15, Issue 1 / Pages 24–31

Abstract

Purpose: To evaluate corneal biomechanics using Corvis ST in healthy eyes from Iranian keratorefractive surgery candidates.


Methods: In this prospective consecutive observational case series, the intraocular pressure (IOP), central corneal thickness (CCT), and biomechanical properties of 1,304 eyes from 652 patients were evaluated using Corvis ST. Keratometric readings and manifest refraction were also recorded.


Results: The mean (±SD) age of participants was 28 ± 5 years, and 31.7% were male. The mean spherical equivalent refraction was –3.50 ± 1.57 diopters (D), the mean IOP was 16.8 ± 2.9 mmHg, and the mean CCT was 531 ± 31 μm for the right eye. The respective means (±SD) corneal biomechanical parameters of the right eye were as follows: first applanation time: 7.36 ± 0.39 milliseconds (ms); first applanation length: 1.82 ± 0.22 mm; velocity in: 0.12 ± 0.04 m/s; second applanation time: 20.13 ± 0.48 ms; second applanation length: 1.34 ± 0.55 mm; velocity out: –0.67 ± 0.17 m/s; total time: 16.84 ± 0.64 ms; deformation amplitude: 1.05 ± 0.10 mm; peak distance: 4.60 ± 1.01 mm; and concave radius of curvature: 7.35 ± 1.39 mm. In the linear regression analysis, IOP exhibited a statistically significant association with the first and second applanation times, total time, velocity in, peak distance, deformation amplitude, and concave radius of curvature.


Conclusion: Our study results can be used as a reference for the interpretation of Corvis ST parameters in healthy refractive surgery candidates in the Iranian population. Our results confirmed that IOP is a major determinant of Corvis parameters.

Keywords:

Central Corneal Thickness, Corneal Biomechanics, Corvis ST, Intraocular Pressure

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