Abstract
Background
Corneal hysteresis (CH) has been associated with visual field damage in glaucoma and is related to the velocity of perimetric glaucoma progression. We undertook this investigation to determine whether CH is associated with structural markers of glaucoma damage on spectral domain optical coherence tomography (SD-OCT).
Methods
In this retrospective study, 131 patients under glaucoma evaluation were evaluated with SD-OCT (Cirrus; Carl Zeiss Meditec, Dublin, CA) and had CH measurements with the ocular response analyzer (Reichert, Inc., Buffalo, NY). Pearson and partial correlation adjusting for age were preformed to examine the association between CH and variables of interest. Generalized estimating equations were used to construct simple and multiple linear models.
Results
While Pearson correlations were modest overall, CH best correlated with mean deviation (MD; r = 0.19) followed by average retinal nerve fiber layer (RNFL) thickness (r = 0.18) and vertical cup to disc ratio (r = −0.11) in the open angle glaucoma group. In univariable models, CH varied as a function of MD (ß = 0.1, 95 % CI 0.03, 0.1; p < 0.001) and of average RNFL thickness (ß = 0.2, 95 % CI 0.1, 0.4; p = 0.001). In a multivariable analysis including MD, age, average RNFL thickness, and glaucoma status, MD (p = 0.001) and age (p < 0.001) retained significant associations with CH.
Conclusions
In patients under evaluation and treatment for glaucoma, CH was more closely related to visual field MD than to structural markers of glaucoma damage as measured by SD-OCT.
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Funding/Support
This study was supported by the Medical Student Training in Aging Research Program, by the Seth Sprague Educational & Charitable Foundation, by Research to Prevent Blindness and by The American Glaucoma Society through the Mentoring for Advancement of Physician-Scientists award program.
Financial disclosure
NMR has received honoraria from Allergan, Alcon, Merck & Co., Inc., Iridex, Carl Zeiss Meditec and Merge Healthcare.
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Vu, D.M., Silva, F.Q., Haseltine, S.J. et al. Relationship between corneal hysteresis and optic nerve parameters measured with spectral domain optical coherence tomography. Graefes Arch Clin Exp Ophthalmol 251, 1777–1783 (2013). https://doi.org/10.1007/s00417-013-2311-x
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DOI: https://doi.org/10.1007/s00417-013-2311-x