Clinical performance of non‐contact tonometry by Reichert AT550^® in glaucomatous patients

Abstract

Measuring intraocular pressure (IOP) by non-contact tonometry (NCT) has been demonstrated to be a valid and reliable technique to be used in primary eye care; it is easier to use, it does not transmit infectious diseases, and it is not necessary to use anaesthetic or staining eye drops. Recently, a new NCT device has showed an excellent level of agreement with Goldmann tonometry, but there are no records of its performance in glaucomatous eyes. To rectify this, IOP was measured in twenty-two patients (44 eyes) receiving medical treatment to control elevated IOP, with AT550 and Goldmann tonometry. Mean values of IOP were 18.98 +/- 2.77 and 19.08 +/- 3.02 mmHg using Goldmann and AT550, respectively. Plots of differences against means displayed good agreement (mean difference +/- limits of agreement, -0.09 +/- 3.30); this value was not significantly different from zero (t-test for dependent samples, p = 0.709). In conclusion, IOP values as measured with the AT550 NCT are clinically comparable with those obtained with Goldmann tonometry in glaucomatous patients. This validates this NCT not only for screening of IOP but to follow-up glaucomatous patients with a rapid, non-invasive method.

Comparison of Intraocular Pressure Measurements Obtained by Icare PRO Rebound Tonometer, Tomey FT-1000 Noncontact Tonometer, and Goldmann Applanation Tonometer in Healthy Subjects

“…Readings of IOP with the Reichert AT550-NCT were clinically comparable to those obtained with GAT. 19 We found no statistically significant difference between Icare PRO RT, NCT, and GAT measurements in thicker corneas. In thinner corneas Icare PRO RT-IOP readings were similar to GAT.…”

Accuracy of the New ICare Rebound Tonometer vs. Other Portable Tonometers in Healthy Eyes

“…[1][2][3][4][5] The Perkins applanation tonometer (Medtronic Solan, Jacksonville, FL) is a portable version of the GAT, also requiring topical instillation of fluorescein and anesthesia. Close agreement has previously been found between both tonometers.…”

Surveillance for ocular hypertension: an evidence synthesis and economic evaluation

“…In total, 642 reports were identified from the electronic searches as being possibly relevant. [189][190][191][192] three in each of Saudi Arabia, [193][194][195] India, [196][197][198] Portugal 106,199,200 and Greece [201][202][203] and two in Taiwan, 125,204 Israel, 205,206 the Netherlands, 207,208 Sweden 209,210 and Turkey. 211,212 One study took place in each of Austria, 126 Brazil, 213 France, 123 Ireland, 214 New Zealand, 215 Norway 216 and Denmark.…”