Evaluation of Rebound Tonometer for Measuring Intraocular Pressure at Deviated Angle and Position

Takenaka, Joji; Mochizuki, Hideki; Kunihara, Eriko; Tanaka, Junko; Kiuchi, Yoshiaki

doi:10.3109/02713683.2010.534574

Cited by 11 publications

(10 citation statements)

References 11 publications

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“…On the other hand, the small probe used by an inexperienced user can give errors from off‐centre placement and misalignment of the instrument and probe on the cornea. Investigators have evaluated the influence of probe placement at various locations of the cornea, including errors due to various angling of the probe . Prior studies have not evaluated differences in measurement as a function of a small displacement of 1.5 mm from the centre, which is quite possible under real clinical circumstances.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of intraocular pressure estimates obtained using an iCare rebound tonometer

Khanal

Walton²,

Davey

2017

Clinical and Experimental Optometry

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There is good intra- and inter-observer repeatability of IOP data, as obtained by the iCare rebound tonometer, although the results may be slightly influenced by practitioner experience. The difference in IOP estimates obtained by different observers is unlikely to be of clinical significance. Corneal thickness showed regional variation; however, this did not influence IOP measurements obtained from those locations.

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Section: Discussionmentioning

confidence: 99%

Evaluation of intraocular pressure estimates obtained using an iCare rebound tonometer

Khanal

Walton²,

Davey

2017

Clinical and Experimental Optometry

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“… 14 As all measurements were taken with patients in a seated position, any differences arising due to postural changes are not an issue in the present study. However, Takenaka et al 15 determined that the reliability of IOP measurements may be lower in children who move during assessment. Therefore, only cooperative subjects who were able to remain motionless during measurement were included in the present study.…”

Section: Discussionmentioning

confidence: 99%

Comparison of Intraocular Pressure Measurements in Healthy Pediatric Patients using Three Types of Tonometers

Eraslan

Çerman

Sümmen

2017

tjo

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Objectives:This study aimed to compare intraocular pressure (IOP) measurements in healthy pediatric patients using three types of tonometers.Materials and Methods:Seventy-eight eyes of 78 patients under the age of 18 who underwent a routine ophthalmologic examination were included in the study. IOP was measured using Tono-Pen (TP) tonometry, Goldmann applanation tonometry (GAT), and non-contact tonometry (NCT), consecutively. IOP was adjusted based on central corneal thickness (CCT). Patients with any ocular disorders other than a limited refractive error were excluded from the study.Results:The study consisted of 46 girls and 32 boys. The mean age was 12.6±2.7 (range: 5-17) years. The mean CCT was 559.3±35.3 µm. The mean refractive error was -0.50±1.70. The mean level of visual acuity was 0.98±0.1 (range: 0.3-1.0) using the Snellen chart. Significant differences were found between the measurement results of each of the three tonometric methods. Mean IOP was 12.1±2.2 mmHg for TP, 15.7±2.5 mmHg for GAT, and 17.1±3.1 mmHg for NCT. The correlations between measurement methods revealed that the highest correlation was between NCT and GAT (p<0.001, r=0.670). The second highest correlation was between NCT and TP (p<0.001, r=0.477). The lowest correlation was between GAT and TP (p<0.001, r=0.403). A positive correlation was found between CCT and each IOP measurement method.Conclusion:In pediatric patients, TP and NCT measurements were found to be positively correlated with GAT measurements. Because TP measurements were lower than GAT measurements and NCT measurements were higher than GAT measurements, patient follow-ups, treatment strategies, and surgery plans must be organized taking these differences into consideration.

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“…An advantage of RBT is associated with topical anesthesia that is not necessary since contact with the cornea is very brief. In addition, the corneal flattening area is minimal (Takenaka et al 2011).…”

Section: Introductionmentioning

confidence: 96%

Macroscopic morphological aspects, ecometry and rebound tonometry of the eye bulb in sloth (Bradypus variegatus)

et al. 2020

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The field related to the visual system of wild animals is deeply scarce. Settling anatomical and physiological parameters for these animals is still a descriptive vision for Bradypus variegatus (Schinz, 1825). Thus, our research aimed to determine patterns of normal eye for this species. For this purpose, eight eye bulbs were dissected from the carcasses obtained by natural death, and then performed an overview of ocular anatomical. Rebound tonometry (RBT) and ocular B-mode ultrasonography were also applied for eight eyes in four animals from “Parque Estadual Dois Irmãos”, situated in the city of Recife, state of Pernambuco (PE), to estimate the intraocular pressure and ocular ecobiometry. The ocular morphology of sloth is similar as described for other species, however, with some peculiarities. They present a third eyelid emerging in the nasal region of the inferior conjunctival sac and retina and also contain little differentiated blood vessels. Medium the intraocular pressure (IOP) was 4.25mmHg with no difference for both eyes. Ultrasonography of ocular anatomy is also similar regarding other species. Ecobiometric patterns were evaluated to determine the anterior chamber depth, lens width, vitreous chamber depth, and axial length (AL) of ocular globe and the averaged as shown 0.63±1.11mm, 3.73±0.24mm, 6.15±0.41mm, 3.70±0.27mm, and 8.48±0.22mm, respectively. There was no difference between the right and left eyes. The RBT and ocular B-mode ultrasonography are fast exams and easy for animal testing. This study contributed to the characterization of ocular anatomy as well as settling medium values of IOP and intraocular measures; however, further research on physiology and histology is necessary to better understand the visual function of the species.

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Evaluation of Rebound Tonometer for Measuring Intraocular Pressure at Deviated Angle and Position

Cited by 11 publications

References 11 publications

Evaluation of intraocular pressure estimates obtained using an iCare rebound tonometer

Evaluation of intraocular pressure estimates obtained using an iCare rebound tonometer

Comparison of Intraocular Pressure Measurements in Healthy Pediatric Patients using Three Types of Tonometers

Macroscopic morphological aspects, ecometry and rebound tonometry of the eye bulb in sloth (Bradypus variegatus)

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