Aktuelle Tagungsinformationen
News and Updates
Anmeldung zur Tagung
Registration
Hotelbuchung
Hotel Registration
Grußwort
Welcome address
Beteiligte Gesellschaften
Societies involved
Eröffnung des Kongresses
Opening Ceremony
Preise
Awards
Wissenschaftliches Programm
Scientific program
Posterpräsentationen
Poster Presentation
Kurse
Courses
Begleitende Veranstaltungen
Collateral Events
Rahmenprogramm
Social program
Jubiläumsparty
Jubilee Party
DOG Information
DOG Information
Allgemeine Informationen
General Information
Autorenindex
Index of Authors
Ausstellerliste
Exhibitors
Sponsoren
Sponsors
Teilnahmegebühren
Registration fees
Impressum
DOG Homepage
Conventional Confocal Long-wavelength Laser Scanning Tomography of the Optic Nerve Head Supplemented by Confocal Short-wavelength Laser Scanning Tomography
1Schmitz-Valckenberg P., 2Kamppeter B. A.,
1Augenklinik im Evangelischen Stift (Koblenz)
2Ruprecht-Karls-Universität Heidelberg, Fakultät für klinische Medizin Mannheim, Augenklinik (Mannheim)
Purpose: The conventional confocal laser scanning tomography of the optic nerve head uses a long-wavelength laser (wavelength 670 nm) for imaging and measurement of the optic disc. Since the inner retinal layers can better be imaged by a short-wavelength light, it was the purpose of the present study to examine whether the conventional tomography can be supplemented by additionally using a short-wavelength laser scanning tomograph.
Methods: The study included 32 eyes of subjects who were examined with a conventional confocal laser scanning tomograph (Heidelberg Retina Tomograph, HRT). Additionally, a confocal scanning laser tomography of the optic disc was performed using a short-wavelength laser tomograph (wavelength: 549 nm) (Heidelberg Retina Angiograph, HRA), and color stereo optic disc photographs were taken.
Results: Without knowledge of the HRA image, mean optic disc area as measured by the HRT was 2.12±0.21 mm². With knowledge of the HRA image, measured mean optic disc area was 2.09±0.33 mm². It is a difference of 3.92±10.9%.
Conclusions: In this pilot study, the combination of a long-wavelength confocal laser scanning tomograph with a short-wavelength laser scanning tomograph gave similar results in optic disc area measurements as the disc measurements using a single long-wavelength confocal laser scanning tomograph. The results suggest that the combination of both techniques results in similar data, and that by increasing the contrast, use of a short-wavelength laser the morphometric examination of the optic disc is facilitated. It may have importance for a fully automatic optic disc analysis.