Abstract
Purpose
To investigate tear film function, central and peripheral corneal sensitivity and corneal subbasal nerve morphology in the cornea after deep anterior lamellar keratoplasty (DALK) compared with penetrating keratoplasty (PK).
Methods
This prospective study compared the changes in 16 eyes of 16 patients who underwent DALK (DALK group) with those in 28 eyes of 28 patients who underwent PK (PK group). Thirty healthy volunteers were also included as controls. Tear functions were evaluated using tear break-up time (TBUT), tear meniscus height (TMH) and corneal fluorescein staining. Corneal sensation was measured with a Cochet-Bonnet esthesiometer. Corneal subbasal nerve morphology was evaluated using in vivo confocal microscopy (IVCM). The patients were examined 1, 3, 6, 9 and 12 months after keratoplasty.
Results
Postoperatively, TMH recovered significantly faster in the DALK group than in the PK group (p < 0.05), and the postoperative TBUT was much higher in the DALK group compared with the PK group (p < 0.05). Central and peripheral corneal sensitivity remained lower in both the PK and DALK groups at 12 months after surgery compared with the control group (p < 0.05). The peripheral corneal sensitivity of the host cornea was significantly higher than the central corneal sensitivity (p < 0.05). No significant difference was found in corneal sensitivity between the PK and DALK groups. There was no significant correlation between corneal sensitivity and tear film function after PK or DALK.
Conclusions
Tear film function was restored more rapidly after DALK compared with PK, but there was no significant difference in corneal sensitivity between PK and DALK.
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Acknowledgments
This study was supported by the National Natural Science Foundation of China (30801263; 81270972) and the Fund for Young Prominent Scholars of Sun Yat-sen University (11ykpy66).
Ethical standards
The study was approved by the Investigational Review Board of Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China. The research was consistent with the tenets of the Declaration of Helsinki. All persons enrolled gave their informed consent prior to their inclusion in the study.
Conflicts of interest
This study was supported by the National Natural Science Foundation of China (30801263; 81270972) and the Fund for Young Prominent Scholars of Sun Yat-sen University (11ykpy66). Xiaolei Lin, Binbin Xu, Yifang Sun, Jing Zhong, Weilan Huang, and Jin Yuan declare that they have no conflicts of interest.
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Xiaolei Lin and Binbin Xu are contributed equally to this work.
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Lin, X., Xu, B., Sun, Y. et al. Comparison of deep anterior lamellar keratoplasty and penetrating keratoplasty with respect to postoperative corneal sensitivity and tear film function. Graefes Arch Clin Exp Ophthalmol 252, 1779–1787 (2014). https://doi.org/10.1007/s00417-014-2748-6
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DOI: https://doi.org/10.1007/s00417-014-2748-6