These devices also enable the measurement of IOP even in bedridden patients, which is particularly important in patient populations with a growing life expectancy.
#ICARE TONOMETRY SERIES#
Although the Goldmann applanation tonometer (GAT) has been the gold standard for the measurement of IOP, a series of rebound tonometers can measure IOP more objectively than other tonometers and without the use of topical anesthesia.
Because a 1-mmHg increase in intraocular pressure (IOP) increases the risk of the development glaucoma by 10 to 18% and a 1-mmHg decrease in IOP reduces the progression of glaucoma by 10%, an accurate measurement of IOP is undoubtedly essential for glaucoma patients. It is estimated that 79.6 million individuals will be living with glaucoma in 2020, and this number is likely to increase to 111.8 million in 2040. Glaucoma is the second most common cause of blindness worldwide. Elevation of IOP in the supine position, especially in eyes with bleb, was more sensitively captured with IC200 than with IcarePRO. GAT, IcarePRO, and IC200 had sufficiently high reproducibility, but measurements with IcarePRO may not be accurate in the supine position. The IOPs of the single and continuous modes of IC200 were interchangeable in both positions. IOP elevation was significant in eyes without bleb versus those with bleb, but this finding was not observed when IOP was measured with IcarePRO. IOPs measured with all tonometers were significantly elevated in the supine position as compared with the sitting position, but this difference was significantly greater with IC200-single and IC200-continuous compared with IcarePRO.
IOPs measured with IcarePRO or IC200 were significantly lower than those with GAT, particularly in patients with low IOP. ResultsĪll tonometers provided high reproducibility in both positions (all intraclass correlation coefficients > 0.90), although it was highest with GAT, followed by IC200-continuous and IC200-single and then IcarePRO. IC200 measurement was performed using two modes: single six (IC200-single) and automatic (IC200-continuous) six-measurements mode. IcarePRO and IC200 measurements were also obtained in the supine position. We measured the intraocular pressure (IOP) in 145 eyes of 145 glaucoma patients in the sitting position using GAT, IcarePRO, and IC200. This was a prospective cross-sectional study. This study investigated the agreement between a new rebound tonometer, IC200, and IcarePRO and Goldmann applanation tonometry (GAT).
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