Stock RA, Ströher C, Sampaio RR, et al. - An observational, cross-sectional, and comparative study with a quantitative approach was performed to ascertain if the non-contact air-puff tonometer (NCT) is an appropriate alternative to the Goldmann applanation tonometer (GAT) for measuring intraocular pressure (IOP). Participants in the study were 90 patients (180 eyes). Data reported that the total mean IOP according to NCT measurements was 14.12 mmHg, and the total mean IOP according to the GAT was 12.98 mmHg. When dividing the participants into three groups according to the measurement range obtained and comparing the mean NCT and GAT measurements in each group, in Group 1 (10– 15 mmHg), no statistically significant difference was observed between the means of the two tonometers, a difference was noted between Group 2 (16– 19 mmHg) and Group 3 (20 mmHg or more). The approximate mean of the GAT measures was provided by the NCT in group 1 but was overestimated in group 2 and 3 measurements.