Ophthalmology in China

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Evaluation of accuracy of measuring intraocular pressure using iCare HOME tonometer 

TAN Juan, ZHAO Ping, LIU Rui, PENG Yue, LIU Yang, WU Bo.   

  1. Shenyang Aier Eye Hospital, Aier School of Ophthalmology, Central South University, Changsha 410083, China
  • Received:2018-04-19 Online:2018-07-25 Published:2018-07-27
  • Contact: ZHAO Ping, Email: zp2k@vip.163.com


Objective  To evaluate the accuracy of iCare HOME tonometer measuring intraocular pressure(IOP) at different levels compared with Goldmann applanation tonometer (GAT) and non-contact tonometer (NCT). Design Diagnostic trial. Participants A total of 120 eyes of 76 patients or normal subjects in Shenyang Aier Eye Hospital were examined, including glaucoma (77 eyes of 48 patients), glaucoma suspect (13 eyes of 8 patients), cataract patients (23 eyes of 16 patients) and normal subjects (7 eyes of 4 subjects).  Methods All participants’ IOP was measured with iCare HOME, GAT and NCT, and grouped according to the results of GAT (group A: IOP <16 mmHg, group B: 16~21 mmHg, group C: >21 mmHg). One-way ANOVA, Bland-Altman analysis and linear correlation analysis were used to compare the consistency and correlation of iCare HOME, GAT and NCT measurements. Main Outcome Measures IOP. Results  The mean IOP measured with iCare HOME, GAT and NCT was (18.32±6.52) mmHg, (18.14±5.82) mmHg and (19.10±5.85) mmHg respectively (F=0.846, P=0.430). The correlation coefficients (r) of iCare HOME and GAT, iCare HOME and NCT, GAT and NCT was 0.947, 0.961 and 0.937 (all P<0.01) respectively. The results of three types of tonometer were different with different IOP levels. The difference between iCare HOME and GAT increased with the increase of IOP, while the difference between iCare HOME and NCT decreased with the increase of IOP. Bland-altman analysis showed that there was a good consistency between the three types of IOP measurement. Conclusion The accuracy of iCare HOME is good for the measurement of IOP, and it is consistent with GAT and NCT measurements. (Ophthalmol CHN, 2018, 27: 286-290)

Key words: iCare HOME, intraocular pressure, glaucoma