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Abstract #60123 Published in IGR 16-4
IOP agreement between I-Care TA01 rebound tonometer and the Goldmann applanation tonometer in eyes with and without glaucoma
Sinha G; Gupta S; Temkar S; Pandey V; Sihota R; Dada TInternational Ophthalmology 2014; 0:
To analyze correlation of intraocular pressure (IOP) measurement between new rebound tonometer (RBT) I-Care TA01 and Goldmann applanation tonometer (GAT). One hundred eighty-five eyes of 185 subjects presenting with glaucoma or cataract were enrolled in the study. In all patients, IOP was obtained by an ophthalmologist using I-Care TA01 and GAT. IOP between the two were compared at range of 8-15, 16-21, and >22 mmHg and difference was considered as significant at p < 0.05 (t test). Bland-Altman analysis tested agreement between instruments overall and for each subgroup of patients with glaucoma or no glaucoma (cataract only). Of 185 patients, 86 had glaucoma; 99 did not. Mean age of patients was 55.77 ± 14.46 years; with no difference between the two subgroups (p = 0.12). There was no significant difference in mean IOP between the two tonometers at IOP between 8-15 mmHg (p = 0.097) and 16-21 mmHg (p = 0.51). However, a significant difference was observed between the two at IOP > 22 mmHg (p = 0.023) with mean GAT (24.8 mmHg) being higher than mean RBT (23.16 mmHg). Overall, there was no difference between the two (p = 0.59) and they had a high correlation (Pearson correlation r = 0.815; p = 0.01). The mean difference between the two was 0.1 (95 % agreement limits: UL +6 (1.96SD), LL -5.8 (-1.96SD)), in patients with no glaucoma was 0.091 (95 % AL: UL +4.8 (1.96SD), LL -4.6 (-1.96SD)), and in patients with glaucoma was 0.151 (95 % AL: UL +7.25 (1.96SD), LL -6.9 (-1.96SD)). RBT I-Care TA01 and Goldmann tonometer cannot be used interchangeably due to large limits of agreement.
Department of Ophthalmology, Dr. Rajendra Prasad Centre for Ophthalmic Sciences, All India Institute of Medical Sciences, New Delhi, 110029, India.
Full articleClassification:
6.1.1 Devices, techniques (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)