advertisement
Abstract #46714 Published in IGR 13-3
Comparison of Goldmann tonometry, pneumotonometry and the effect of the central corneal thickness
Molina N; Milla E; Bitrian E; Larena C; Martinez LArchivos de la Sociedad Española de Oftalmologia 2010; 85: 325-328
Purpose: To compare the intraocular pressure (IOP) measurements using the Goldmann applanation tonometer (GAT) and contact pneumotonometer (NTC), and to evaluate the effects of central corneal thickness (CCT) on the readings. Methods: This was a prospective, observational clinical study, which included 96 eyes of 49 patients, 40 glaucomatous, 29 ocular hypertensive and 27 normal subjects. The IOP measurements were performed with each tonometer. The CCT was also measured. Results: A strong correlation coefficient between GAT and the NTC was found (Pearson = 0.922, p < 0.001). The mean of paired differences between GAT and NTC was 0.72 (plus or minus) 2.82 mmHg. The mean difference between GAT and NTC was low at lower levels of PIO and higher at higher levels of IOP. Readings with the GAT showed a mean increase in IOP of 0.47 mmHg for every 10 (mu)m of CCT, and the NTC 0.34 mmHg for every 10 (mu)m, the diference was not statistically significant. Conclusions: The contact pneumotonometer is a reliable method in diagnosis and follow up of our population. The effect of the central corneal thickness was more important for the Goldmann applanation tonometer.
N. Molina. Instituto Clinic de Oftalmologia, Hospital Clinic i Provincial de Barcelona, Barcelona, Spain.
Classification:
6.1.1 Devices, techniques (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)
