Exavue utilise un frontofocomètre automatique unique en France permettant la mesure des verres unifocaux , multifocaux et progressifs ainsi que des lentilles cornéennes.
L’ appareil permet la mesure précise de tous les paramètres optiques, notamment l'addition et de la direction du couloir de progression, ainsi que des mesures de l’ écart pupillaire.
Vue de la représentation schématique (identique pour chaque verre , indépendamment de la puissance) exposant l'orientation du couloir progressif
Graphique séparé affichant la courbe de la puissance du verre progressif le long du couloir et la différence entre la puissance de la vision de près et de loin .
Les verres progressifs présentent les zones de vision suivantes :
- Une zone de vision de loin VL.
- Un couloir de progression situé entre les zones latérales d'aberration A.
- Le couloir de progression contient la zone de vision intermédiaire VI et débouche dans la zone de vision de près VP.
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