Sir,
We appreciate the insightful comments of Drs Qiu and Zhang on our published article.1 We had shown earlier that eyes with higher intraocular pressure (IOP) are more predisposed to having lower corneal hysteresis (CH), indicating that IOP levels may affect the measurement of CH.2 After phototherapeutic keratectomy (PTK), we topically administered the steroid, fluorometholone (0.1%), four times daily for 1 week, the dose being gradually reduced thereafter. However, the corneal compensated IOP measured with an Ocular Response Analyzer (Reichert Ophthalmic Instruments, Depew, New York, USA) was 15.8±3.8 mm Hg preoperatively and 16.3±3.9 mm Hg 3 months postoperatively. No significant IOP rise as a result of the response to the steroid occurred in any eye during the follow-up period. Accordingly, we consider that IOP did not significantly affect the measurement of CH in eyes undergoing PTK in this study.
References
Kamiya K, Shimizu K, Ohmoto F . The changes in corneal biomechanical parameters after phototherapeutic keratectomy in eyes with granular corneal dystrophy. Eye 2008; 19 December 2008 [e-pub ahead of print].
Kamiya K, Hagishima M, Fujimura F, Shimizu K . Factors affecting corneal hysteresis in normal eyes. Graefes Arch Clin Exp Ophthalmol 2008; 246: 1491–1494.
Author information
Authors and Affiliations
Corresponding author
Ethics declarations
Competing interests
The author declares no conflict of interest..
Rights and permissions
About this article
Cite this article
Kamiya, K. Reply to Corneal hysteresis in eyes undergoing phototherapeutic keratectomy. Eye 24, 744 (2010). https://doi.org/10.1038/eye.2009.127
Published:
Issue Date:
DOI: https://doi.org/10.1038/eye.2009.127