Icare® rebound tonometers: review of their characteristics and ease of use

Shunsuke Nakakura, Shunsuke Nakakura

Abstract

The rebound tonometer has a unique mechanism for measuring intraocular pressure (IOP) and has become popular worldwide due to its ease of use. The most notable advantages are the lack of an air-puff and need for topical anesthesia, ease of operation and transport, and the ability to use it with children. Four rebound tonometers (Icare® TA01i, Icare PRO, Icare HOME, and Icare ic100) are currently available for clinical examination. It is important to understand the characteristics of each tonometer and select the most appropriate one because the IOP values and the purpose of measurement are different. In this review, with the goal of improving the understanding of a range of tonometers, the issues with each device are discussed.

Keywords: Icare; glaucoma; intraocular pressure; rebound tonometer.

Conflict of interest statement

Disclosure The author reports no conflicts of interest in this work.

Figures

Figure 1
Figure 1
Icare® TA01i. Notes: (A) Overview. (B) Measurements for children. Icare TA01i is the most flexible among the four Icare series tonometers because we can measure IOP at various angles. (C) Display shown with IOP. Abbreviation: IOP, intraocular pressure.
Figure 2
Figure 2
Probes used in Icare® series. Note: The short probe is only for Icare® PRO, and the long probe is for Icare® TA01i, Icare® HOME, and Icare® ic100.
Figure 3
Figure 3
Icare® PRO. Note: (A) Overview and (B) display panel shown with IOP values and measurement validity with color (green, yellow, and red).
Figure 4
Figure 4
Icare HOME. Notes: (A) Overview. (B) Green light seen by patients during IOP measurement. (C) Display panel shown with messages. Abbreviation: IOP, intraocular pressure.
Figure 5
Figure 5
Icare ic100. Notes: (A) Overview. The green light indicates that the sensor recognizes the position is upright. (B) Color display shown with IOP and validity of measurements (superior, IOP and blue circle means it is the second IOP measurement among six; middle, IOP value after six measurements with a caution [yellow circle]; and inferior results, “repeat”). Abbreviation: IOP, intraocular pressure.
Figure 6
Figure 6
(A) Box plots with mean IOP of Icare ic100 and GAT. IOP was significantly lower with the Icare ic100 than with GAT by about 2.5 mmHg. (B) Scatterplot of IOPs from Icare ic100 and GAT.

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