Le test de la vision de loin donne les mesures de :
- la correction de la myopie (-) ou l’ hypermétropie (+) : Sphère [signe] en dioptries
- la correction de l’astigmatisme : Cylindre en dioptries et Axe en degrés
- l’ acuité en dixièmes
ex : Vision de loin Sphère: -2,25 dioptries Cylindre: +0,25 dioptries Axe: 45° Acuité Visuelle: 8 /10
Le test de la vision de près donne les mesures de :
ex: Vision de prés Addition: -1,50 dioptries Acuité Visuelle: Pd 3
Sur les ordonnances d’ ophtalmologistes en France , la prescription pour verres de lunettes est interprétée en tenant compte de :
* des abréviations utilisées :
- OD : œil droit
- OG ou OS : œil gauche
- VL : vision de loin
- VP : vision de près
- AV : acuité visuelle
- Add : addition
- n/10 : n dixièmes ( unité de mesure de l’ acuité en vision de loin ) [normal si n=2]
- Pd n : Parinaud n ( unité de mesure de l’ acuité en vision de près ) [normal si n=10]
- dp : dioptries ( unité de mesure de la vergence (puissance d'un verre) précédée d'un signe:
* de l’ omission des corrections avec des valeurs nulles
* de l’ omission des acuités avec des valeurs normales 10/10 et Parinaud 2
* du signe de la sphère en vision de loin :
| signe + (vergence positive) |
hypermétropie |
|
signe – (vergence négative) |
myopie |
Une prescription de lentilles de contact comporte en plus :
- le nom et le type
- la teinte
- la courbe de base
- le diamètre
L’ opticien doit toujours vérifier par un examen de vue la cohérence de la prescription de l’ ordonnance.
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