intraocular pressure measurements by three different tonometers in children with aphakic glaucoma and a thick cornea

نویسندگان

mohammad reza razeghinejad poostchi ophthalmology research center, shiraz university of medical sciences, shiraz, iran

ramin salouti poostchi ophthalmology research center, shiraz university of medical sciences, shiraz, iran

mohammad reza khalili poostchi ophthalmology research center, shiraz university of medical sciences, shiraz, iran

چکیده

background: to evaluate the agreement in intraocular pressure (iop) measurements by ocular response analyzer (ora) and tono-pen xl (txl) with the goldmann applanation tonometer (gat) and to examine corneal biomechanical properties in aphakic glaucoma patients with a central corneal thickness (cct) >600 µ. methods: thirty-six eyes of aphakic glaucoma patients (group 1) and 40 eyes of normal children (group 2) were studied. the mean ora and txl iop values were compared with the gat-iop values. regression analyses were used to evaluate the associations between iop and cct, corneal hysteresis (ch), and corneal resistance factor (crf). bland-altman plots were used to evaluate the agreement between the tonometers. results: the mean±standard deviations of the age and male/female ratio were 16.58±5.44 and 15.75±5.04 years and 14/22 and 18/22 in group 1 and group 2, respectively. cct in group 1 was 651.1±42 and in group 2 was 567.3±32.4. in group 1, the mean txl (22.4, p=0.004), iopcc (corneal compensated) (27.8, p=0.005), and iopg (goldmann correlated) values (28.1, p<0.0001) were greater than gat-iop (20.6). in group 2, only iopg value (16.4) was higher than gat-iop (14.8, p=0.04). iop reading of all the tonometers were positively and negatively associated with crf and ch in the multiple regression analysis, respectively. conclusion: the txl had a greater agreement with the gat, and the ora overestimated iop in aphakic glaucoma patients. the ora and txl seemed to be affected by ch and crf.

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عنوان ژورنال:
iranian journal of medical sciences

جلد ۳۹، شماره ۱، صفحات ۱۱-۰

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