Intraocular Pressure According to Eye Gaze by iCare Rebound Tonometry in Normal Participants and Glaucoma Patients

Background/aimsTo investigate the effect of eyelid manipulation on the measurement of intraocular pressure (IOP) using two different tonometries (rebound tonometry (RT) vs Goldmann applanation tonometry (GAT)).Methods103 patients with primary open-angle glaucoma were prospectively enrolled. For all of the patients, IOP measurements were performed in three different ways: (1) RT with lid manipulation (LM), (2) RT without LM and (3) GAT. The order of the three measurements was randomly selected. Additionally, the palpebral fissure height (PFH; elliptical space between upper and lower eyelids) was measured.ResultsThe mean value of IOP measured by GAT was 13.97±2.80 mm Hg, which was not significantly different from that by RT without LM (13.75±2.44 mm Hg; P=0.096), but which was significantly lower than that by RT with LM (15.21±2.91 mm Hg; P<0.001). On a Bland-Altman plot, RT with LM was overestimated relative to GAT (mean: −1.5) and RT without LM (mean: −1.2). Among the high IOPs (>20 mm Hg), interestingly, those measured by RT without LM were significantly lower than those measured by GAT (P<0.001). In the subgroup analysis of PFH, the smaller the PFH, the more exaggerated the IOP difference between GAT (P=0.014) and RT with LM (P<0.001).ConclusionRT-measured IOP was significantly exaggerated when manipulation was applied to the eyelid. This overall trend was more pronounced when PFH was small. GAT-measured IOP, meanwhile, showed a good correlation with IOP measured using RT without LM.

Download Full-text

INTRAOCULAR PRESSURE IN CLINICALLY NORMAL BROOK TROUt (SALVELINUS FONTINALIS) BY MEANS OF REBOUND TONOMETRY

Journal of Zoo and Wildlife Medicine ◽

10.1638/2018-0146 ◽

2019 ◽

Vol 50 (1) ◽

pp. 107

Keyword(s):

Intraocular Pressure ◽

Brook Trout ◽

Salvelinus Fontinalis ◽

Rebound Tonometry ◽

Clinically Normal

Download Full-text

Assessment of intraocular pressure with Icare rebound tonometry in a pediatric ophthalmology clinic

Journal of American Association for Pediatric Ophthalmology and Strabismus ◽

10.1016/j.jaapos.2015.07.194 ◽

2015 ◽

Vol 19 (4) ◽

pp. e61

Author(s):

Aman Sharma ◽

Desiree Albert ◽

Matthew S. Pihlblad ◽

Megan Sheeley ◽

Nicholas Strauss ◽

...

Keyword(s):

Intraocular Pressure ◽

Pediatric Ophthalmology ◽

Rebound Tonometry

Download Full-text

Determination of Tear Production and Intraocular Pressure With Rebound Tonometry in Wild Humboldt Penguins (Spheniscus humboldti)

Journal of Avian Medicine and Surgery ◽

10.1647/2015-134 ◽

2017 ◽

Vol 31 (1) ◽

pp. 16-23 ◽

Cited By ~ 2

Author(s):

Julie D. Sheldon ◽

Michael J. Adkesson ◽

Matthew C. Allender ◽

Gwen Jankowski ◽

Jennifer Langan ◽

...

Keyword(s):

Intraocular Pressure ◽

Rebound Tonometry ◽

Tear Production

Download Full-text

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

Pesquisa Veterinária Brasileira ◽

10.1590/1678-5150-pvb-6172 ◽

2020 ◽

Vol 40 (9) ◽

pp. 707-716

Author(s):

Richelle S. Braz ◽

Marleyne J.A.A.L. Amorim ◽

Fabrício B. Sá ◽

Priscilla V. Albuquerque ◽

Elayne Cristine S. Silva ◽

...

Keyword(s):

Intraocular Pressure ◽

Anterior Chamber Depth ◽

Animal Testing ◽

Rebound Tonometry ◽

Morphological Aspects ◽

Nasal Region ◽

Bradypus Variegatus ◽

The Right ◽

The City

ABSTRACT: 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.

Download Full-text

Comparison of Intraocular Pressure before and after Laser in Situ Keratomileusis Measured with Applanation Tonometry, Non Contact Tonometry and Rebound Tonometry

QJM ◽

10.1093/qjmed/hcab109.011 ◽

2021 ◽

Vol 114 (Supplement_1) ◽

Author(s):

Fatma Gebreel Ahmed Gaber ◽

Tamer Mohamed El- Raggal ◽

Mohamed Gamil Metwally ◽

Ahmed Abdelmonsef Ebeid

Keyword(s):

Intraocular Pressure ◽

Central Corneal Thickness ◽

Open Angle Glaucoma ◽

Corneal Thickness ◽

Applanation Tonometry ◽

Goldmann Applanation Tonometry ◽

Rebound Tonometry ◽

Different Types ◽

Before And After

Abstract Background Measurement of intraocular pressure (IOP) plays a central role throughout ophthalmology. It is part of routine ophthalmologic examinations and important in the management and follow-up of patients with glaucoma. While elevated IOP remains the most important risk factor for development and progression of open angle glaucoma, at least half of the population diagnosed with open angle glaucoma is asymptomatic. Objectives The aim of our study is to compare the accuracy of intraocular pressure measurement before and after Laser in situ keratomeulsis (LASIK) surgery using three different types of Tonometers: Goldmann Applanation tonometry (GAT), Non contact tonometry (NCT) and Rebound tonometry (I care), considering the change in the central corneal thickness (CCT). Patients and Methods In this study Eighty eyes of 40 patients with mean age of 27.00±6.00 years were scheduled for LASIK..Central corneal thickness before and after surgery was obtained by Ultrasound (US) pachymetry.IOP values were measured before and after surgery using three different types of Tonometers: Goldmann Applanation tonometry, Non contact tonometry and Rebound tonometry. Results The results revealed that lower post-operative IOP measurements using all techniques. The least affected technique was Non –contact with IOP change 16%, followed by GAT with IOP change 18%, and finally Rebound with IOP change 19 %, respectively. The percentage of change in CCT between pre- and post- LASIK surgery measured with the Ultrasound pachymetry was statistically highly significant. There was a clinical significant correlation between Percentage of tissue ablation (PTA) and IOP change for GAT, NCT and rebound tonometry. Also, there was a significant correlation between Residual stromal bed (RSB) and IOP change for GAT and NCT. There was no clinical significant correlation between Ablation depth (AD) and percentage of change of IOP measurements pre and post LASIK, except for IOP measured with GAT when AD < 40.00 µm. Conclusion Refractive surgery causes significant lowering of IOP as measured using Goldmann applanation tonometry, non contact tonometry and rebound tonometry. The least affected tonometry post LASIK is non contact tonometry. The reduction was correlated to the percentage of tissue ablated. The ideal method to measure IOP in post-LASIK patients would be a device that is free of corneal factors.

Download Full-text