scholarly journals Intra-ocular pressure measurements using the Ocular Response Analyser and ICare tonometer: A comparison

2015 ◽  
Vol 74 (1) ◽  
Author(s):  
Wayne D.H. Gillan
Keyword(s):  
Pressure Measurements ◽  
Eye Care ◽  
Rebound Tonometer ◽  
Intra Ocular Pressure ◽  
Ocular Pressure ◽  
Icare Rebound Tonometer ◽  
Ocular Response Analyser

The accurate measurement of intra-ocular pressure (IOP) is an important procedure in the detection and treatment of glaucoma. The Ocular Response Analyser (ORA) and the ICare rebound tonometer are two recent additions to the instruments available to eye care practitioners for the measurement of IOP. The present study investigated whether the ORA and the ICare tonometer can be used interchangeably. Twenty-eight subjects had three measures of IOP taken using the two instruments. The ORA provides two different measures of IOP – Goldmann and cornea compensated IOP – whilst the ICare tonometer provides IOP only. The results of this study suggest that only the ORA Goldmann and ICare IOP measures are comparable. In general, it is advisable not to use the ORA and ICare tonometers interchangeably.

A system for wireless intra-ocular pressure measurements using a silicon micromachined sensor

1992 ◽  
Vol 2 (3) ◽  
pp. 202-204 ◽  
Author(s):  
L Rosengren ◽  
Y Backlund ◽  
T Sjostrom ◽  
B Hok ◽  
B Svedbergh
Keyword(s):  
Pressure Measurements ◽  
Intra Ocular Pressure ◽  
Ocular Pressure

scholarly journals Comparison of IOP Measurement by Goldmann Applanation Tonometer, ICare Rebound Tonometer, and Tono-Pen in Keratoconus Patients after MyoRing Implantation

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Mahmoud Rateb ◽  
Mahmoud Abdel-Radi ◽  
Zeiad Eldaly ◽  
Mohamed Nagy Elmohamady ◽  
Asaad Noor El Din
Keyword(s):  
Central Corneal Thickness ◽  
Pearson Correlation ◽  
Corneal Thickness ◽  
Altman Analysis ◽  
Bland Altman Analysis ◽  
Rebound Tonometer ◽  
Goldmann Applanation Tonometer ◽  
Significant Difference ◽  
Applanation Tonometer ◽  
Icare Rebound Tonometer

Purpose. To evaluate the different IOP readings by Goldmann applanation tonometer (GAT), ICare rebound tonometer, and Tono-Pen in keratoconus patients after MyoRing implantation. To assess the influence of central corneal thickness (CCT) and thinnest corneal location (TCL) on IOP measurements by different tonometers. Setting. Prospective observational study was conducted in two private centers in Egypt from February 2015 to November 2016. Methods. Seventeen eyes of 10 patients suffering from keratoconus and who underwent MyoRing implantation were recruited. All subjects underwent GAT, ICare, and Tono-Pen IOP measurements in random order. Central corneal thickness and thinnest corneal location were assessed by Pentacam. Difference in mean in IOP readings was assessed by T-test. Correlation between each pair of devices was evaluated by Pearson correlation coefficient. The Bland–Altman analysis was used to assess intertonometer agreement. Results. Seventeen eyes (10 patients) were evaluated. The mean IOP reading was 13.9 ± 3.68, 12.41 ± 2.87, and 14.29 ± 1.31 mmHg in GAT, ICare, and Tono-Pen group, respectively. There was a significant difference between IOP readings by GAT/ICare and Tono-Pen/ICare (p value: 0.032 and 0.002, respectively) with no significant difference between GAT/Tono-Pen (p value: 0.554). Mean difference in IOP measurements between GAT/ICare was 1.49 ± 2.61 mmHg, Tono-Pen/ICare was 1.89 ± 2.15 mmHg, and GAT/Tono-Pen was −0.39 ± 2.59 mmHg. There was no significant correlation between the difference in IOP readings among any pair of devices and CCC or TCL. The Bland–Altman analysis showed a reasonable agreement between any pair of tonometers.

scholarly journals Effect of trabeculectomy and canaloplasty on intra-ocular pressure modifications after postural changes in open-angle glaucoma

2014 ◽  
Vol 92 (6) ◽  
pp. e498-e499 ◽  
Author(s):  
Luciano Quaranta ◽  
Elena Biagioli ◽  
Ivano Riva ◽  
Claudia Tosoni ◽  
Paolo Brusini ◽  
...  
Keyword(s):  
Open Angle Glaucoma ◽  
Open Angle ◽  
Intra Ocular Pressure ◽  
Postural Changes ◽  
Ocular Pressure

Intra-ocular pressure changes during maximal isometric contraction: Does this reflect intra-cranial pressure or retinal venous pressure?

1999 ◽  
Vol 21 (3) ◽  
pp. 243-246 ◽  
Author(s):  
Rob D. Dickerman ◽  
Greg H. Smith ◽  
Len Langham-Roof ◽  
Walter J. McConathy ◽  
John W. East ◽  
...  
Keyword(s):  
Isometric Contraction ◽  
Venous Pressure ◽  
Retinal Venous Pressure ◽  
Intra Ocular Pressure ◽  
Ocular Pressure ◽  
Pressure Changes ◽  
Intra Cranial Pressure

Telemedicine in the control of intra-ocular pressure

2000 ◽  
Vol 6 (1_suppl) ◽  
pp. 126-128 ◽  
Author(s):  
G Michelson ◽  
W Striebel ◽  
W Prihoda ◽  
Volker Schmidt
Keyword(s):  
Cost Effective ◽  
Western World ◽  
Pressure Curve ◽  
Effective Technique ◽  
Intra Ocular Pressure ◽  
Continuous Evaluation ◽  
Common Causes ◽  
Cost Effective Technique ◽  
Email Message ◽  
Ocular Pressure

Glaucoma is one of the most common causes of blindness in the Western world and a major risk factor is increased intra-ocular pressure. We therefore used telemedicine in its control. Patients measured their intra-ocular pressure several times a day with a portable instrument and the values were then entered into a portable digital assistant. These data were transmitted by a modem to a central server. If the intra-ocular pressure was pathologically high, an email message was automatically sent to the ophthalmologist. The pressure curve, including a statistical analysis, was displayed in an easily readable chart format. Ten patients with glaucoma participated in a trial. Self-tonometry with telemedicine enabled continuous evaluation of the patient by the ophthalmologist. This approach offered the advantage of controlling the treatment remotely. Advantages for the patient were that the measurements were easily done at home under normal conditions, and the patient could control when the measurement and data transmission would be performed. Telemedicine is a cost-effective technique enabling the early diagnosis of pathologically increased intra-ocular pressure.

Oral drugs for glaucoma

1965 ◽  
Vol 3 (25) ◽  
pp. 99-100
Keyword(s):  
Carbonic Anhydrase ◽  
Anterior Chamber ◽  
Peripheral Vision ◽  
Oral Drugs ◽  
Carbonic Anhydrase Inhibitors ◽  
Intra Ocular Pressure ◽  
Ocular Pressure ◽  
Minor Operations ◽  
Closed Angle ◽  
Short Time

To prevent loss of peripheral vision in chronic glaucoma uninterrupted control of intra-ocular pressure is important, and we have discussed the use of local applications for this.1 A carbonic anhydrase inhibitor given by mouth may be a useful adjunct to treatment when intra-ocular pressure cannot be controlled by local applications alone or by operations such as cutting a drainage channel from the anterior chamber to the subconjunctival tissue. Carbonic anhydrase inhibitors may also usefully reduce tension for a short time in acute closed angle glaucoma (where the drainage angle of the anterior chamber is blocked), in acute glaucoma due to uveitis (the commonest cause of secondary glaucoma) and before operations for glaucoma. Their use is dangerous if they mask symptoms and so delay surgery; and thus for eye conditions carbonic anhydrase inhibitors are best given only on the advice of an ophthalmologist. The value of certain minor operations (e.g. trabeculotomy) which may increase the responsiveness of the eye to drugs is being investigated.

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