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Diaton tonometer for intraocular pressure measurements after laser in situ keratomileusis

Lei Liu, Jing Li, Xin-Yu Li, Yu-Long Wang, Man Xu Refractive Surgery Center, Tongji Hospital, Tongji Medical College of Huazhong University of Science and Technology, Wuhan 430030, Hubei Province, China  
AIM: To evaluate the performance of Diaton tonometer(DT) before and after laser in situ keratomileusis(LASIK) by comparing it with non-contact tonometer (NCT). METHODS:NCT and DT were used to measure the intraocular pressure before and 1 month after LASIK, the results were analyzed with SPSS 13.0. RESULTS: One month postoperatively, NCT readings declined by 5.76±2.31mmHg, DT readings did not differ significantly(t=0.70,P=0.487); the difference between NCT and DT readings had positive correlation with declined corneal thickness, and had negative correlation with the central corneal thickness postoperatively. CONCLUSION: DT readings were not affected by corneal thickness; therefore, Diaton tonometer may be a better choice for the measurement of intraocular pressure after LASIK.
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