Diaton tonometry: an assessment of validity and preference against Goldmann tonometry

Abstract

Background: To assess agreement between the Diaton, a new transpalpebral tonometer, and Goldmann applanation tonometry, the accepted gold standard.

Glaucoma: a new approach for detection in rural eye care

“…34 More recently, two trans-scleral tonometers have also been reported -a rebound tonometer (Diaton), which uses a plunger rebounding from the sclera, and a trans-scleral indentation tonometer (Pro-view), which is based on measuring the force resulting in a pressure phosphene reaction. [35][36] Yet another group of instruments is based on optical methods such as optical coherence tomography (OCT), however at present time these are not suitable for measuring pressure. 37 A common disadvantage of these tonometer is that the detector is immediate in contact with the cornea.…”

“…The top ten innovative principles recommended by expandable TRIZ matrix were used to solve the Problem. The principles used are preliminary action (10), inversion (13), dynamicity (15), copying (26), mechanical substitution (28) and parameter change (35). By using the above innovative principles the device was developed.…”

Intraocular pressure menagement with transpalpebral tonometry

“…In our recent study, we aimed to examine the effects of central corneal thickness on the measures obtained from transpalpebral tonometry (Diaton), and to identify correlations between intraocular pressure (IOP) measurements with Diaton and the Goldmann applanation tonometer (GAT), we have shown that the mean Diaton tonometer readings were lower than C-GAT measurements Furthermore, the Diaton measurements show moderate correlation with those provided by applanation tonometry and Diaton tonometer seems to be more affected by the corneal thickness, especially in the thinnest corneas [3]. In another study by Doherty et al [2] two hundred and fifty right eyes underwent both Goldmann applanation tonometry and Diaton tonometry. Mean intraocular pressure was 13.8±3.6 mmHg using Goldmann applanation tonometry and 13.2±4.3 mmHg using the transpalpebral tonometry.…”

“…Additionally, the tonometer tip of Diaton is to be placed as close to the ciliary edge as possible [2,3]. The transpalpebral tonometer may be effective in the presence of conjunctival or corneal disease, following corneal surgery, in bedridden patients, in children and in contact lenswears [2]. The patient is in a recumbent position, with the glance line being oriented at an angle of approximately 45° to the horizontal.…”

“…The acoustic sensor of vertical position and new software of automatic intraocular pressure average value evaluation from a series of measurements are introduced into the Diaton tonometer as updates from TGDc-01. Additionally, the tonometer tip of Diaton is to be placed as close to the ciliary edge as possible [2,3]. The transpalpebral tonometer may be effective in the presence of conjunctival or corneal disease, following corneal surgery, in bedridden patients, in children and in contact lenswears [2].…”