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
Microperimetry is a specific examination used to precisely assess retina sensibility. It can apply to photopic, mesopic or scotopic media; it measures the functionality of cones and rods, which are the retina photoreceptor cells. It completes the detailed morphological analysis provided by the OCT. Once combined, these two methods propose a complete report of the patient’s visual function by correlating retinal structure and function.
L’analyse de la sensibilité vise à déterminer l’ampleur des lésions induites par certaines pathologies et les troubles visuels qui en résultent. Cet examen s’accompagne d’une mesure de la stabilité de fixation du patient, donnée importante dans l’évaluation de la qualité visuelle. Au cœur du métier des orthoptistes, les micropérimètres permettent également de rééduquer les patients dits basse vision, atteints de maculopathie et présentant une très faible acuité visuelle.
Unlike the usual examination of the visual field, the microperimetry, which is still a subjective test depending on the patient’s answer, is able to precisely target the analysis zone and to determine the exact location of the visual defect.
The MP-3S is a microperimeter equipped with a 3D tracking system of the eye and a non-mydriatic fundus camera used to perform microperimetry, to assess the sensibility of photoreceptor cells of the retina. The range of light intensities, from 0 to 34 dB in photopic/mesopic and from 0 to 24 dBin scotopic and the max. luminance of stimuli at 10,000 abs makes possible detecting the lowest sensibilities.
The MP-3S is a microperimeter equipped with a 3D tracking system of the eye and a non-mydriatic fundus camera used to perform microperimetry, to assess the sensibility of photoreceptor cells of the retina. The range of light intensities, from 0 to 34 dB in photopic/mesopic and from 0 to 24 dBin scotopic and the max. luminance of stimuli at 10,000 abs makes possible detecting the lowest sensibilities.
The purpose of microperimetry is assessing the retinal sensibility, the running of the photoreceptor cells of the eye, of the cones and rods, using light stimuli proposed to the patient. The stimuli are emitted with different intensities, with increasing or decreasing values (depending on the strategy selected to determine the threshold) in order to define the response thresholds of retina. Each time the patient detects the stimulus, he/she presses the response bulb, thus indicating to the instrument that he/she has got the intensity of this stimulus. Once the stimulus is not detected any more, the maximal sensibility is set (in dB).
Les micropérimètres, à l’inverse des appareils classiques de champ visuel, possèdent un système de suivi de la rétine (tracking) en trois dimensions qui permet de positionner précisément les stimuli sur une zone choisie de la rétine et donc la zone d’analyse.
Les résultats sont présentés sur un fond d’œil afin de visualiser la position des stimulis et leur valeur seuil. Également grâce au tracking, le micropérimètre suit la fixation du patient au cours de l’examen de micropérimétrie pour en définir sa stabilité et évaluer la qualité visuelle globale. Cette indication permet ensuite de définir des stratégies de rééducation visuelle, employées principalement chez les patients ayant une très faible acuité visuelle (basse vision).
Daily, any human person continuously tests his environment, particularly by moving his eyes. So, he can stand in the environment and anticipate his motions and moves. Therefore the human eye has a moving strategy, mainly based on central vision.
Lorsqu’un patient présente de graves troubles visuels et notamment lorsqu’il perd la vision centrale, les mouvements oculaires perdent en efficacité et le patient présente de grandes difficultés dans la réalisation de ses tâches quotidiennes.
The purpose of rehabilitation, performed using a microperimeter, is training the patient to stabilise his/her fixation and use a better sensibility retina zone to improve the way he/she tests the environment. This training is performed through beeps that guide the patient so he/she can use a better fixation zone.
The microperimetry examination can last several minutes and the patient should concentrate during the whole examination. He/she uses a response switch he/she presses any time he/she detects light stimuli: this is a subjective examination.
There are two types of photoreceptor cells in charge of vision. As they do not use the same use the same light conditions, there are two types of microperimeter. deux types de micropérimètre.
The usual microperimeter works in mesopic and photopic media, i.e when light conditions match daylight and twilight.
Il permet l’analyse des cellules fonctionnant dans ces conditions qui sont majoritairement les cônes, responsables de la vision centrale, précise et des couleurs.
The scotopic microperimeter can work in the dark, i.e. under night or scotopic light conditions.
Les cellules spécifiquement ciblées sont alors les bâtonnets, impliquées dans la vision périphérique, des contrastes et des mouvements. Cet examen nécessite une adaptation à l’obscurité d’au moins 20 minutes.
Microperimetry is the only technique allowing determining the retina sensibility on a precise zone to assess the fixation stability. We can then control the correlation between the structure and the function and better understand the patient’s global visual function.
Equipment with independent eye and retina tracking
Precise positioning of stimuli and overlapping of results on colour photography
Analyses in photopic, mesopic and scotopic conditions
Visual rehabilitation function
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.
Découvrez le NIDEK Experience Center ! Tous les mois, retrouver des sessions live animées par
Le congrès JPO (Journées Perpignanaises d’Ophtalmologie) aura lieu le 9 et 10 avril 2021 de
Le cours sur « OCT de A à Z » organisé par VuExplorer Institute aura
Les plus grands verriers utilisent les frontofocomètres NIDEK pour leurs technologies et leurs précisions. Comme
Le congrès LYON ŒIL RETINE qui se tiendra les 10 & 11 Décembre 2021, NIDEK
Le congrès JOI aura lieu en présentiel le vendredi 26 et samedi 27 novembre 2021,
NIDEK participera au congrès COP’S les 25 et 26 novembre au Palais des congrès Tours
Les JAO 2021 auront lieu en présentiel le vendredi 26 novembre 2021, NIDEK sera présent
© 2021 • NIDEK SA – All rights reserved
Ce site est réservé aux professionnels de santé
