Efficient After Sales Service
At your disposal whatever the situation
Made in France
Our consultation units
Our experts at your disposal
60 experts over the territory
Tonometry is used in all ophthalmology consultations to measure the intraocular pressure (IOP). The tonometry examination is carried out using an instrument called tonometer, usually found, today, in its contactless version. In fact the constant evolution of technology has made possible the introduction of forced-air tonometers, thus replacing the contact with the patient’s eye with the use of forced air, as it is soft and painless to the eye surface.
The forced-air tonometer measures the force required to deform the cornea in order to reduce its pressure. So, to improve the accuracy and make better the measure of the intraocular pressure, the instruments integrate, today, the measure of the cornea thickness (pachymetry) to propose a corrected value of the intraocular pressure.
Also, thanks to different automated systems integrated to the contactless tonometer, using it is quick and easy. Moreover, the addition of the auto-refracto-keratometer function to the TONOREF III gives a 4-in-1 machine (refraction, keratometry, tonometry and pachymetry).
Tonomètre sans contact permettant la mesure de la pression intra-oculaire (PIO) par jet d’air. Modèles de tonomètre (NT-1) et tono-pachymètre (NT-1p) dont la mesure est automatisée du début jusqu’à la fin du process. Aucune intervention d’un opérateur n’est nécessaire. Appareil disponible avec la mesure automatique de pachymétrie (modèle NT-1p) pour davantage de précision de résultat.
4-in-1 measuring instrument integrating the automatic measure of the objective sphero-cylindrical refraction error, of the keratometry, of the intraocular pressure and the pachymetry. Several readings in the same device!
The forced-air tonometer is based upon the Goldmann tonometer contact instrument. This device is used to assess the intraocular pressure by calculating the mechanical force required to flatten a 3.06 mm diameter corneal zone. The contactless tonometer uses an air jet to flatten the cornea.
The measuring system of the contactless tonometer works as follows: the instrument has a central air duct with, on one side, an infrared light emitter and a sensor on the other side. At rest, the cornea, which has a convex shape, diffuses light and the sensor of the instrument detects no signal. The air jet pressure is gradually increased in the duct to warp the cornea.
During the flattening, the corneal surface acts as a flat mirror reflecting the light to the sensor. Once the sensor has received the reflected light, the signal is sent to the instrument to deactivate the air jet. The intraocular pressure (IOP) is then measured from the actual air jet pressure required to flatten the cornea. As the corneal anaesthesia is not required to perform this examination, this device is the most frequently used one in ophthalmology.
The measure of pachymetry (cornea thickness) is integrated to TONOPACHY NT-530P and TONOREF III devices. This value makes possible applying a corrective factor to the value of the intraocular pressure, depending on the central cornea thickness. The central pachymetry is measured using the specular reflexion principle. The device calculates the distance between the paths of the epithelial reflexion and the endothelial reflexion on the CDD sensor.
The forced-air tonometer is a contactless device used to measure the intraocular pressure (IOP) simply using an air jet. So we can rapidly detect and make the following-up of some eye pathologies requiring applying eyestrain, such as glaucomas. Also, pachymetry information is interesting to detect and make the following-up of patient having a keratoconus.
You have a project? You want a quotation? You have questions about our products? Feel free to ask your technical sales representative.
Reliability and
safety
NIDEK develops its top-of-the-range products to improve visual health through an approach based on strict criteria: safety, reliability, durability, continuous quality controls and certifications.
Technologies and
innovations
NIDEK meets technical challenges by keeping constantly informed of the innovations of eye imaging systems, using the expertise of professionals and the progresses of research.
Services and
guarantees
NIDEK commits itself to providing services to its customers, from the installation of an activity to the authorised training of teams, and to offering long-time measurable guarantees.
Nous sommes ravis d’annoncer la participation de NIDEK SA à la Journée Nationale de Téléophtalmologie
Nous avons le plaisir d’annoncer la participation de NIDEK SA au SILMO 2024, le salon
SFO 2024 : Merci ! Nous tenons à exprimer notre sincère gratitude à tous nos
NIDEK SA participe à la SFO : Découvrez notre nouvel OCT RS-1 au Hall 6
Nous sommes ravis d’annoncer la participation de NIDEK SA à la Journée Nationale de Téléophtalmologie
Nous avons le plaisir d’annoncer la participation de NIDEK SA au SILMO 2024, le salon
NIDEK SA participe à la SFO : Découvrez notre nouvel OCT RS-1 au Hall 6
Chers clients, Nous souhaitons vous informer qu’exceptionnellement, NIDEK SA sera indisponible le 11 avril 2024.
KEY PRODUCTS
© 2021 • NIDEK SA – All rights reserved
Ce site est réservé aux professionnels de santé
