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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | McGhee, Charles N. J. Ali, Noor Q. Turuwhenua, Jason Gokul, Akilesh Patel, Dipika V. Vellara, Hans R. |
| Description | Country affiliation: New Zealand Author Affiliation: Vellara HR ( Department of Ophthalmology New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand.); Ali NQ ( Department of Ophthalmology New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand.); Gokul A ( Department of Ophthalmology New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand.); Turuwhenua J ( School of Optometry and Visual Sciences, University of Auckland, Auckland, New Zealand.); Patel DV ( Department of Ophthalmology New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand.); McGhee CN ( Department of Ophthalmology New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand.) |
| Abstract | PURPOSE: To examine and evaluate ocular biomechanical metrics and additionally derived corneal and orbital components using a noncontact Scheimpflug-based tonometer (CorVis ST) in a population of healthy eyes. METHODS: A total of 152 eyes of 152 participants were examined by slit-lamp biomicroscopy, corneal tomography, and the CorVis ST (CST). This determined the distribution of outputs from the CST, such as deformation amplitude (DA), and additionally derived parameters, including maximum corneal deformation (MCD), maximum orbital deformation (MOD), and corneal energy dissipation (CED). RESULTS: The mean age of participants was 35.88 ± 13.8 years. Deformation amplitude significantly correlated with age (r = 0.24, P = 0.002) but not sex or ethnicity (P > 0.05). Multiple linear regression analysis revealed significant correlations between DA and age (r = 0.19, P = 0.006) and DA and IOP (r = -0.59, P < 0.001). Age correlated with MCD (r = 0.20, P = 0.01), MOD (r = 0.18, P = 0.03), and CED (r = 0.39, P < 0.001). Males had a lower MOD than females (0.24 vs. 0.26 mm, respectively, P = 0.01); however, there were no differences in MCD or CED between sexes (P > 0.05). There were no significant differences between ethnicities for MCD, MOD, and CED (P > 0.05). Multiple linear regression analysis revealed significant correlations between MCD and IOP (r = -0.65, P < 0.001), CED and age (r = 0.41, P < 0.001), CED and IOP (r = 0.28, P = 0.001), and between CED and central corneal thickness (CCT) (r = -0.36, P < 0.001). CONCLUSIONS: The isolation of the corneal component (MCD) should be used when analyzing deformation characteristics in diseases that only affect the cornea. This study establishes a baseline for a population of healthy eyes. Future publications will identify differences in MCD, MOD, and CED between healthy and diseased populations. |
| ISSN | 01460404 |
| e-ISSN | 15525783 |
| Journal | Investigative Opthalmology & Visual Science |
| Issue Number | 11 |
| Volume Number | 56 |
| Language | English |
| Publisher | Association for Research in Vision and Ophthalmology |
| Publisher Date | 2015-10-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Cornea Physiology Adolescent Biomechanical Phenomena Elasticity Sex Factors Slit Lamp Tonometry, Ocular Discipline Ophthalmology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Ophthalmology Sensory Systems Cellular and Molecular Neuroscience |
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