Purchase this article with an account.
Shunya Tatara, Fumiatsu Maeda, Yoshinosuke Tsukahara, Kiyoshi Yaoeda; Fluctuation of Intraocular Pressure with Noncontact Tonometer and Rebound Tonometer in the Normal Volunteers. Invest. Ophthalmol. Vis. Sci. 2021;62(8):2558.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
It is known that the intraocular pressure (IOP) measurement by the Goldmann applanation tonometer (GAT) tend to fluctuate because of several artifactual factors. This is thought to be mainly influenced by several factors on the observer sides of GAT measurements. In this study, we investigated the fluctuation of IOP by a noncontact tonometer (NCT) and a rebound tonometer (RT) which are considered that the influence of the observer's skill is small.
The subjects were 37 normal volunteers recruited from the university students. IOP was measured on the subjects by NCT and RT for 5 consecutive days (11:00 to 13:00). Six successive IOP measurements were carried out using CT-1 (Topcon) and Icare PRO (Icare Finland Oy) on the same day. IOP was measured in the first eye (right or left) and then in the fellow eye and IOP was again measured in the first eye and then in the fellow eye. Repeated-measures analysis of variance was used to test differences in IOP between the consecutive measurements (day 1 to 5) or the successive measurements (first to sixth). A P-value < 0.05 was considered statistically significant.
IOP measured by a NCT was significantly higher in both the left and right eye on day1 than on other measurement days (P= 0.000-0.041). IOP measured by RT was significantly higher in both the left and right eye on day1 than that on the other days (P= 0.000-0.030). IOP measured by a NCT were no significant differences in the successive measurements. On the other hand, there were several differences in the successive measurements (e.g. the first IOP measurement was significantly higher than the second to sixth IOP measurements on day 1) with RT measurements.
IOP as measured by a NCT and a RT on day 1 were higher than that on the other day. IOP as measured by a NCT is more stable than that by a RT in the intrasession measurements.
This is a 2021 ARVO Annual Meeting abstract.
This PDF is available to Subscribers Only