208 La distribution des déficits du champ visuel par quadrant dans la périmétrie standard automatisée, comparée à la périmétrie en fréquence doublée - 14/05/09
The distribution of visual field defects per quadrant in standard automated perimetry as compared to Frequency Doubling Technology perimetry
Résumé |
Purpose |
To test the ability of Frequency Doubling Technology (FDT) perimetry to reveal defects in the same field quadrants as detected by Standard Automated Perimetry (SAP).
Patients and methods |
Ninety-two eyes with open-angle glaucoma and documented visual field defects by threshold SAP (Octopus Dynamic Program) also underwent threshold FDT testing after successfully passing the screening FDT test.
Results |
All eyes revealed varying stages of SAP defects while only 80 revealed FDT damage: 31: 21 eyes in the early field loss stage, 36: 35 in the moderate category, and 25: 24 in the severe one in SAP vs FDT, respectively. SAP was able to detect abnormalities in 74% and 79% of the superotemporal, and inferotemporal quadrants, respectively, while the corresponding FDT figures were 70% and 69% for the same quadrants (p<0.05 each). As for the nasal hemifield, SAP detected defects in 73% and 81% of the superonasal and inferonasal quadrants, respectively, compared to 69% and 66% for FDT (p<0.001 each). The test duration per individual eye was significantly shorter with FDT than with SAP (p<0.05).
Conclusion |
Beside the already established lower sensitivity of FDT compared to SAP, this study demonstrates a significantly poorer ability of FDT in detecting the same field quadrant defects, especially in the early stages of glaucomatous damage.
Le texte complet de cet article est disponible en PDF.Vol 32 - N° S1
P. 1S74 - avril 2009 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.