Distribution of kappa angle measured by iTrace in a population of China / 眼科新进展

ABSTRACT

Objective To explore the distribution of the kappa angles in population of Tianjin,China and the differences in kappa angle measured by iTrace and Pentacam.Methods A retrospective research was conducted.The kappa angle of 4815 patients (4815 eyes) and kappa angle was measured and recorded through iTrace from June 2014 to December 2016 in Tianjin Medical University Eye hospital and meanwhile,the kappa angle of 10α1 eyes selected from the total sample was also measured with pencatam.Results The kappa angle was (0.47 ± 0.48) mm,and patients with kappa angle ＜ 0.50 mum accounted for 70.07％.There was no significant difference in kappa angle of different genders (P =0.090).Right eyes had larger kappa anger than left eyes,approaching significant difference (P =0.000).Kappa anger was slightly correlated with age (r =0.129,P ＜ 0.05).And kappa angle measured by iTrace was significantly smaller than that measured by Pentacam (P =0.000).Conclusion The kappa angle in the population is non-normal and most of them are less than 0.5 mm.There is significant difference between the kappa angle measured by iTrace and pentacam.