Abstract
Background/aims
To determine the possible roles of impaired corneal sensitivity and reduced tear secretion in various types of corneal epithelial disorders.
Methods
A total of 99 patients (179 eyes) with corneal epithelial disorders classified as persistent epithelial defects (PED), corneal erosion, or superficial punctate keratopathy (SPK) and 115 individuals (230 eyes) without apparent ocular surface disorders (controls) were enrolled in a prospective study. Corneal sensitivity was measured with a Cochet-Bonnet esthesiometer, and tear secretion was measured by the Schirmer test in each subject.
Results
Corneal sensitivity of eyes in the PED and corneal erosion groups was significantly lower than that in the control group. Schirmer test values for eyes in the SPK group were significantly reduced compared with those in the control group.
Conclusion
A loss of corneal sensitivity may contribute to the development of PED and corneal erosion, whereas reduced tear secretion may be a contributing factor for SPK. Both results indicate the importance of corneal sensory innervation to the maintenance of corneal integrity.
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Acknowledgments
We wish to thank the following for their clinical contribution to the study: Nobuhiko Chikamoto (Yamaguchi University Hospital, currently Chikamoto EYE Clinic); Keiko Muromoto (Nihon University Itabashi Hospital, currently Saito Eye Clinic); Yasuhiko Okajima (Nihon University Itabashi Hospital, currently Okajima Eye Clinic); Takashi Miyai (Miyata Eye Hospital, currently The University of Tokyo); Ryohei Nejima, and Daisuke Harada (Miyata Eye Hospital, currently Mine Municipal Mitou Hospital); Yuji Kumano (Ohshima Hospital of Ophthalmology); and Akira Sakimoto (Choshi General City Hospital, currently Department of General Pediatrics, Nerima Hikarigaoka Hospital, Nihon University School of Medicine). We also thank the nurses and paramedical staff at the participating hospitals.
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Nishida, T., Chikama, TI., Sawa, M. et al. Differential contributions of impaired corneal sensitivity and reduced tear secretion to corneal epithelial disorders. Jpn J Ophthalmol 56, 20–25 (2012). https://doi.org/10.1007/s10384-011-0105-4
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DOI: https://doi.org/10.1007/s10384-011-0105-4