Tonom GmbH  ©  2017  Privacy Policy

EU Bevollmächtigter und offizieller Distributor von Tonometer Diaton

Tonom GmbH


You are now on the site for health care professionals. Please consider that all the information about Diaton Tonometer is provided for Professionals!

Überzeugende Ergebnisse

Die aufgeführten Referenzen sollen einen Einblick in die Einsatzmöglichkeiten von dem Tonometer Diaton ermöglichen.


Die gezielte Einbindung dieser innovativen Technologie in Ihre Arbeitsabläufe kann zu Optimierung der Patientenbetreuung wesentlich beitragen und den Umgang mit der steigenden Patientenzahlen erleichtern.


Folgend stellen wir Ihnen auch einige klinischen Studien zur Verfügung, die Ihnen einen Eindruck von dem großen Potenzial des Diaton Tonometers geben sollen.




IOP Measurement for Glaucoma Diagnostics and Treatment

Seppo Simila


During the training program worked out by Riika Ervastin and Jenny Nousiaisen the comarison tests of work of three different devices: Keeler Pulsair, Reichert Ophthalmic and Diaton were carried out. The average value of all three devices according to the test results were 11,7 (right eye) and 11,74 (left eye). The results of measurements of all three tonometersdiffer not much and are statistically reliable. The advantages of Diaton are : quickness, simpliscity and reliability of the measurement procedure, measurement in reclining position, small size and portability. IOP measurement throught the eyelid is safe and doesn´t disturb patients. Hospital staffs of Health Centers learn to use the device easily and quickly.



"The (novel tonometer) is easy to use, user-friendly, and can be used on patients for mass screening"

Dr. Shazly, MD, Optometry Time, November 2009

"There are no rubber covers to deal with,and, after the initial purchase, it is virtually maintenance-free.

It is easily portable in your pocket and can be transported from room to room or offfice to office. There is no corneal contact and

pressures can be obtained in patients wearing contact linses. The thechnique is easily and quickly learned.."


Dr. Hope, MD, Optometry Time, November 2009

Fong Zoke Foo, Optometrist (B. Optom, Hons, UKM), Visual View Optometry Centre



The Diaton tonometer is light and easy to handle, I have successfully use this device and detected my client who potentially has glaucoma.  The Daiton tonometer is cheap and unique. It measure IOP through the eyelid and over the sclera with no contact to the cornea & causing no discomfort to my client. It is simple and rapid. The Daiton tonometer has helped me to improve my business and I personally would  recommend this device to be a useful company to any optomatrist!


Comparison of the Diaton Transpalpebral Tonometer Versus Goldmann Applanation



The transpalpebral method of measuring IOP with the Diaton tonometer correlates well with Goldmann applanation. Diaton applanation may be a

clinically useful device for measuring IOP in routine eye exams.


R. S. Davidson 1; N. Faberowski 2; R. J. Noecker 3; M. Y. Kahook 1

1. Ophthalmology, Rocky Mountain Lions Eye Institute, Aurora, CO, USA.

2. Ophthalmology, Denver Health Medical Center, Denver, CO, USA.

3. Ophthalmology, UPMC, Pittsburgh, PA, USA.

Clinical comparison of the Diaton and the Non-contact Tonometerswith the Goldmann applanation tonometer in glaucoma patients 

Nesterov A.P., Illarionova A.R., Obruch B.V.Eye Diseases Department, Russian State Medical University, Moscow


The study shows high reliability of transpalpebral scleral Diaton tonometer enough for clinical purpose. It has both accuracy correlating with GAT and

NCT’s safety and operating speed. Diaton advantage is the possibility to evaluate IOP in cornea pathology, which is very important in glaucoma patients

after corneal including laser surgeries.


ESCRS Meeting, London, September 2006



Comparison of IOP measurements between Goldmann Applanation Tonometry and Ballistic Principle Diaton Tonometry in several groups of patients.  

N. Mithailidou, A. Polychronakos


Ophtalmology Clinic of Thessaloniki, General Hospital "O Agios Dimitrios" 



Ballistic Principle Diaton Tonomety can be used as an alternative for the measurement of the intraocular pressure above eyelids of patients with recent ocular surgeries, after refractive surgeries, with severe corneal injuries, with corneal apoptosis of epithilium and with large pterygium. Additionally, children can be measured easily with Diaton for IOP and also it can be used in patients with mobility problems.

Live From ASCRS: Dr. Mark Latina & Dr. Emil Chynn Review Benefits & Advantages of DIATON transpalpebral tonometer


Emil W. Chynn, MD, FASC from Park Avenue LASEK stated, – “As a Cornea-Refractive trained specialist, I encounter many situations where Goldmann readings are inherently inaccurate–like post-LASIK, in cases of corneal edema, scarring, post-keratoprosthesis or transplant. In such cases, it’s both invaluable and reassuring to have the Diaton device available to measure IOP that’s independent of corneal pathology”


"It works," said Dr. Mark Latina, glaucoma specialist and the inventor of Selective Laser Trabeculoplasty (SLT), after revealing results of the study titled: "Accuracy of Transpalpebral Tonometer Diaton Compared to Goldmann Applanation Tonometer in Normal and Glaucomatous Eyes"



Mark Latina, MD


Massachusetts Eye & Ear Infirmary - Harvard Medical School


Associate Clinical Professor of Ophthalmology, Tufts University School of Medicine  Advanced Glaucoma Specialists, Reading, MA


Emil W. Chynn, MD, FASC


Park Avenue LASEK, New York, NY

Comparison of Accuracy of Diaton Transpalpebral Tonometer Versus Goldmann Applanation Tonometer, Dynamic Contour Tonometer and Ocular Response Analyzer

Henry D. Perry, MD , S.E. Avetisov MD , V.P. Erichev MD, А.А. Antonov MD, А.R. Illarionova MD


Transpalpebral Tonometry is an accurate method of IOP measurement that is also independent from the biomechanical characteristics of cornea.

It can be recommended for IOP measurements of patients diagnosed with glaucoma including those cases where cornea pathology or cornea characteristics have been altered.


Poster at AAO 2010

Accuracy of Transpalpebral Tonometer Compared to Goldmann Applanation Tonometer in Normal and Glaucomatous Eyes

Authors: M.A. Latina, T.A. Shazly, R. Iospa, E.W. Chynn


The Diaton, a transpalpebral measurement device, which avoids corneal contact, correlates within 3 mm Hg of Goldmann applanation tonometry in 83.3 % of eyes in this limited study.

Diaton tonometer may be a clinically useful screening device for measuring IOP.


ARVO 2009

Handheld tonometer offers simple, reliable way to measure IOP Pen-like tonometer designed to be patient-friendly


By Jennifer A. Webb.

Reviewed by John Hope, MD, and Mark Latina, MD


H. Arnold Papernick, OD, an optometrist in private practice in Mt. Pleasant, PA, said the device has been helpful when examining pediatric patients or anyone

who is averse to objects coming at their eye. Excessive blinking can cause IOP measurements to read abnormally high, he explained.

Mark Latina, MD, and Tarek Shazly, MD, members of the Department of Ophthalmology, Massachusetts Eye & Ear Infirmary, Boston, MA, and Emil

William Chynn, MD, an ophthalmologist in private practice at Park Avenue Laser in New York, coordinated a study of Diaton tonometer to compare IOP

measurements taken with Diaton with those from the Goldmann applanation tonometer in normal and glaucomatous eyes.In both the normal and glaucoma groups, 15.15% of the Diaton measurements were exactly the same as those obtained with the Goldmann tonometer. Diaton under-estimated the IOP compared with the Goldmann in 37.87% of eyes, and over-estimated the IOP in 43.93% of eyes.

Meanwhile, John Hope, MD, an ophthalmologist in private practice in Okahoma City, OK, and a diplomate, American Board of Ophthalmology, said he was impressed with the instrument and prefers it because patients “hate the non-contact tonometry” and applanation tonometry is time-consuming and

often requires support staff. He has used the instrument routinely on every patient for at least six months.


Abstracts from publications in Ophthalmology and Optometry Times

Ophthalmology Times, October 15, 2009

Optometry Times, November 2009



490 MARZO 2014


Juan Gonzalo Carracedo Rodríguez, MSc, PhD Coleg. 11.344


Tonometer through the eyelid diaton: accuracy and quick IOP reading.


Through the eyelid tonometer is a suitable screening tool for IOP measuring in patients with keratokonus, cornea pathologies, or in patients after refractive cornea surgery in order to see cornea thickness influence or some other cornea pathologies influence on IOP measuring result. Moreover, this device is easy, portable, does not require anesthetics, it can be used by a doctor to measure IOP in children, in people with limited mobility, in general, it can be used in each person who needs his IOP to be measured.

Change in Intraocular Pressure During Point-of-Care Ultrasound

Cameron Berg, MD, Stephanie J. Doniger, MD, Brita Zaia, MD, and Sarah R. Williams


We compared IOP values between the different methods of tonometry: the traditional Tono-Pen® transcorneal tonometry with the Diaton® tanspalpebral tonometry the difference between the techniques was not statistically significant (+0.03mmHg, range −3 to +4mmHg, p=0.07).


West J Emerg Med. 2015 Mar; 16(2): 263–268.



NEW From ESCRS 2016: Modern transpalpebral scleral tonometry in individuals with and without keratophotorefractive intervention


Transpalpebral scleral tonometry results were independent from biomechanical properties of cornea, while GAT showed dependence of IOP-measurement on these properties. Even CCT corrected GAT IOP values before and after corneal surgery differ a lot from each other, while Diaton tonometry values remain stable. Since both subgroups were well comparable because of their biometric characteristic, it is not expected that IOP would decrease after surgical thinning of the cornea. In the whole group CCT corrected GAT and transpalpebral IOP-values were in a good agreement. This study confirms the reliability and advantages of the clinical application of transpalpebral tonometry after photorefractive surgery

DOG 2017: Glaucoma: Diagnostics: SaF04-06: Repeatability and inter observer variability of IOP data using diaton/

Wiederholbarkeit und Inter-Untersucher-Reliabilität der extrakornealen Tonometrie mittels Diaton ®

Date:Saturday 30 September 2017

Abstract: Dashevsky A.1, Krastel H.2, Kotliar K.3


Fragestellung: Die extrakorneale transpalpebraleTonometrieDiaton ist indiziert bei Hornhauterkrankungen (Ulcera, Keratitiden, Keratokonus) und postoperativen ZustaÅNnden der Hornhaut. Das handliche, kleine Tonometer „Diaton“ kommt auch am Krankenbett zum Einsatz. Die vorliegende Studie befasst sich mit der Reproduzierbarkeit und Interuntersucher- ReliabilitaÅNt der Augeninnendruckmessung mit „Diaton“ sowie mit der Anwendbarkeit des Verfahrens an einer unausgelesenen Folge von Patienten in Sprechstunde.


Methodik: 21 Patienten (42 Augen) nahmen teil. 3 Untersucher führten die Messungen durch: Untersucher 1 hatte langjaÅNhrige Messerfahrung mit „Diaton“. Untersucher 2 und 3 absolvierten einen intensiven Mess-Kurs mit Abschlussprüfung. Die IOD-Messung an jedem Auge wurde mit 5 Min Intervallen in randomisierter Reihenfolge von jedem Untersucher einmal durchgeführt. Die Ergebnisse jedes Untersuchers wurden mit denen der anderen verglichen. Zur Kontrolle wurden an 21 Augen der Patientengruppe IOD-Messungen mit Goldmann-Applanation (GAT) durchgeführt.


Ergebnisse der Diaton-Messungen: [Median(1. Quartil – 3.Quartil)]

Untersucher 1: 15,0 (13,0–17,0) mmHg, Unters. 2: 15,5(13,0–18,5) mmHg, Unters. 3: 15,0(12,3–18,0) mmHg.

Der Unterschied war nicht signifikant (p = 0,645, Kendall’s W-test, power >0,8). Der Inter-Untersucher-Variabilitätskoeffizient betrug: 7 % (4 % – 9 %). Der Intra-Klass-Korrellationskoeffizient und das dazugehörige 95 % Konfidenzintervall betrugen 0,935(0,871–0,971) (p < 0,001). In der zusätzlich separat betrachteten GAT Kontrollgruppe zeigten sich keine signifi kanten Unterschiede zu Diaton: GAT-Werte: 15,5(14,0–17,0) mmHg. Diaton-Werte Untersucher 1: 16,0(15,0–19,0) mmHg; Untersucher 2: 16,0(14,8–19,3) mmHg; Untersucher 3: 16,5(13,0–19,0) mmHg (p = 0,530, Kendall’s W-test, power >0,8).


Schlussfolgerungen: Die Ergebnisse zeigen, dass mit der extrakornealen Diaton-Tonometrie ein ergänzendes reliables Verfahren der Augendruckmessung zur Verfügung steht. Insbesondere ermöglicht Diaton, bei Kontraindikationen gegen die tonometrischen Standardverfahren Druckwerte zu ermitteln (z. B. Ulcus). Zur richtigen Handhabung von Diaton empfehlen wir Teilnahme an einem Anwender-Kurs. Dass Untersucher sich mit dem Messverfahren vertraut machen müssen, ist selbstverständlich: auch für die Goldmann Applanations-Tonometrie ist eine Lernphase notwendig.