You are here

Home » Community

Blogs

How Accurate Are My Eye Pressure Measurements?

Submitted by dave on Sat, 12/16/2006 - 12:45am

Working with my medical team, I have recorded tens of thousands of eye pressure measurements with a variety of tonometers under a variety of conditions. This blog post describes a recent comparison we performed between the Reichert AT555 (a non-contact tonometer or NCT) we use for most eye pressure measurements and Goldman applanation tonometry (GAT) performed by one of the doctors on my medical team. I believe our data indicates that the Reichert AT555 tonometer does an excellent job.

Filed Under (tags):

Paradoxical Effects of Relaxation Techniques Elevating Eye Pressure

Submitted by dave on Fri, 12/15/2006 - 4:14pm

NOTE: This post was made in late 2006. The comments following it were made in early 2007. In the time that has passed since these initial intraocular pressure observations were made (see comments below), we have come to understand this situation much, much better. This thread is interesting for background information, but please see the more recent posts on FitEyes.com if you want to really understand the relationship between stress, breathing, meditation and eye pressure. I have been in contact with a number of people who have tonometers and who have replicated some of these observations, and the patterns continue to hold. Basically, this seems to apply to all glaucoma patients. However, there are individual differences, especially among meditators and non-meditators.

This abstract simply triggers a discussion in the comments below. All the interesting info is in the comments.

Filed Under (tags):

The Pulsair-Keeler non-contact tonometer in self-tonometry: preliminary results.

Submitted by dave on Fri, 12/15/2006 - 4:06pm

EDITOR: this is a very old study. The tonometer discussed here (the original Keeler Pulsair) is no longer manufactured. The current Keeler Pulsair models do not work for self-tonometry due to design changes.

Filed Under (tags):

Comparison of the effects of latanoprost, travoprost, and bimatoprost on circadian intraocular pressure in patients with glaucom

Submitted by dave on Fri, 12/15/2006 - 3:52pm

PURPOSE: To compare 24-hour reduction in intraocular pressure (IOP) by latanoprost 0.005%, travoprost 0.004%, and bimatoprost 0.03% in patients with primary open-angle glaucoma (POAG) or ocular hypertension (OH).

DESIGN: Randomized, double-masked, crossover study.

PARTICIPANTS: Twenty-four patients with POAG and 20 with OH.

Intraocular Pressure and Photorefractive Keratectomy: A Comparison of Three Different Tonometers.

Submitted by dave on Fri, 12/15/2006 - 3:46pm
Cornea. 20(1):33-36, January 2001.
Garzozi, Hanna J. M.D.; Chung, Hak S. M.D., Ph.D.; Lang, Yaron M.D.; Kagemann, Larry M.S., B.M.E.; Harris, Alon Ph.D.

Abstract:
Purpose. To evaluate the intraocular pressure (IOP) with three different instruments, Goldmann applanation tonometer (GAT), noncontact tonometer, and Tono-Pen after photorefractive keratectomy (PRK) for myopia.

Comparison of intraocular pressure measured by non-contact air puff versus Goldmann applanation tonometers in gas-filled vitrect

Submitted by dave on Fri, 12/15/2006 - 3:43pm

OBJECTIVE: To compare intraocular pressure (IOP) measured by two different instruments, air puff tonometer (NCT) versus Goldmann applanation tonometer (GAT), in gas-filled vitrectomized eyes.

DESIGN: Three-month, prospective, comparative trial.

Accuracy of the New ICare Rebound Tonometer vs. Other Portable Tonometers in Healthy Eyes.

Submitted by dave on Fri, 12/15/2006 - 3:34pm

 Optometry & Vision Science. 83(2):102-107, February 2006.

GARCIA-RESUA, CARLOS OD; GONZALEZ-MEIJOME, JOSE M. OD; GILINO, JORGE OD; YEBRA-PIMENTEL, EVA OD, PhD

Filed Under (tags):

Clinical Evaluation of the New TGDc-01 "PRA" Palpebral Tonometer: Comparison with Contact and non-Contact Tonometry.

Submitted by dave on Fri, 12/15/2006 - 2:36pm

Optometry & Vision Science. 82(2):143-150, February 2005.
RESUA, CARLOS GARCIA OD; FERNANDEZ, MARIA J. GIRALDEZ OD; EXPOSITO, ALEJANDRO CERVINO OD; PEREZ, JAVIER GONZALEZ OD; YEBRA-PIMENTEL, EVA OD, PhD

Assessment of the accuracy and reliability of the Topcon CT80 non-contact tonometer.

Submitted by dave on Fri, 12/15/2006 - 2:18pm

BACKGROUND: The reliability of non-contact tonometers has been reported extensively in the literature. This study was designed to assess reliability of the new Topcon CT80 non-contact tonometer in normotensive subjects, using the Goldmann tonometer as the standard.

Comparison of the ICare((R)) rebound tonometer with the Goldmann applanation tonometer by experienced and inexperienced tonometr

Submitted by dave on Fri, 12/15/2006 - 2:15pm

 

Purpose: To assess the agreement between ICare((R)) rebound tonometer and Goldmann applanation tonometer in the hands of experienced and inexperienced tonometrists.

Patients and methods: Two tonometrists, experienced with both Goldmann applanation tonometry (GAT) and ICare(R) Tonometry (ICT) measured intraocular pressure (IOP), in a masked fashion, in 100 patients. In another series of 58 patients, ICT was performed by an inexperienced tonometrist and GAT by an experienced tonometrist.

Inter-instrument agreement and influence of central corneal thickness on measurements with Goldmann, pneumotonometer and noncont

Submitted by dave on Fri, 12/15/2006 - 2:11pm

PURPOSE: This study was conducted to compare the intraocular pressure (IOP) measurements by the Goldman applanation tonometer (GAT), non contact tonometer (NCT) and the ocular blood flow (OBF) pneumotonometer in different IOP ranges in glaucomatous eyes. The effect of central corneal thickness (CCT) on IOP measurement in chronic glaucomatous eyes using the three different tonometers was also evaluated.

Inter-instrument agreement and influence of central corneal thickness on measurements with Goldmann, pneumotonometer and noncont

Submitted by dave on Fri, 12/15/2006 - 2:11pm

PURPOSE: This study was conducted to compare the intraocular pressure (IOP) measurements by the Goldman applanation tonometer (GAT), non contact tonometer (NCT) and the ocular blood flow (OBF) pneumotonometer in different IOP ranges in glaucomatous eyes. The effect of central corneal thickness (CCT) on IOP measurement in chronic glaucomatous eyes using the three different tonometers was also evaluated.

Reproducibility of dynamic contour tonometry. Comparison with TonoPenXL and Goldmann applanation tonometry - a clinical study on

Submitted by dave on Fri, 12/15/2006 - 2:09pm

BACKGROUND: The PASCAL Dynamic Contour Tonometer (DCT) is a new diagnostic approach for the digital measurement of intraocular pressure (IOP) in eyes with glaucoma. The aim of this study was to evaluate the reproducibility of DCT in normal eyes and to compare DCT with Goldmann applanation tonometry (GAT) and TonoPenXL.

Pages

Subscribe to FitEyes.com RSS Feed Subscribe to RSS - blogs