Table 4.

Comparative Results of the Non-Contact Air-Puff Tonometer (NCT) Relative to the Goldmann Applanation Tonometer (GAT) by the Brand/Model of Device from 2005 to 2020

Year	Authors	NCT Brand/Model	NCT Measurement in mmHg	GAT Measurement in mmHg	p	Participants
2021	Stock et al (This research)	Huvitz HNT 7000a	12.22	12.12	0.3100	Group 1: 10–15 mmHg
			17.36	14.39	<0.0001	Group 2: 16–19 mmHg
			21.30	17.50	<0.001	Group 3: ≥20 mmHg
2020	Trakanwitthayarak S	Tomey FT-1000a	14.14	13.60	0.151	Group 1:<21 mmHg
			30.21	35.12	0.016	Group 2: ≥21 mmHg
2019	Luebke et al	Corvis STa	18	17.6	0.1162	Outpatients with a mean age of 66.9 years
		Thomey NCT	16.3	17.6	<0.001
2017	Nakao et al	Corvis ST-IOPpachy	10.3	13.6	<0.01	Patients with primary open-angle glaucoma with a mean age of 61.94 years
		Corvis ST-IOPcc	9.7	13.6	<0.01
		Reichert 7CR-IOPga	13.7	13.6	0.52
		Reichert 7CR-IOPcc	15.5	13.6	<0.01
2017	Jacob et al	Tonoref Nidek II b	<13 mmHg	> GAT	<0.001	Patients aged 20 to 60 years
			≥13 mmHg	<GAT
2016	Mahsud et al	Canon Full Auto Tonometer TX-F	18.17	15.59	0.003	Patients aged 16 to 78 years
2016	Tolomei et al	Nidek SL-300	22.77	17.79	<0.001	Patients with a mean age of 51.6 years
2014	Ilmaz et al	Nidek NT-530a	16.1	15.5	0.998	Patients without glaucoma, with IOP <21 mmHg
2013	Farhood QK	Topcon CT 80	15.91	13.06	0.001	Outpatients aged 15 to 84 years
2009	Salim et al	Reichert PT-100a	15.0	14.3	0.64	Patients without glaucoma with a mean age of 62.6 years
2006	Ogbuehi CK	Topcon CT 80a	13.6	13.4	>0.05	University students aged 20 to 27 years
2005	Ko et al	Topcon CT-60	16.6	15.5	<0.001	Patients older than 18 years

Notes: ^aDevices that showed no difference relative to the Goldman tonometer in at least one of their measurement methods or one of the groups of participants. ^bFor values below 13 mmHg, the NCT obtained higher values than the GAT, and for values equal to or above 13 mmHg, the NCT values were lower than the GAT values.