Laser scanner ophthalmoscope with free selectable wavelength

Dietrich Schweitzer; B. Kalve; Lutz Leistritz; Mateusz Scibor; Martin Hammer

doi:10.1117/12.260863

5 December 1996 Laser scanner ophthalmoscope with free selectable wavelength

Dietrich Schweitzer, B. Kalve, Lutz Leistritz, Mateusz Scibor, Martin Hammer

Proceedings Volume 2930, Lasers in Ophthalmology IV; (1996) https://doi.org/10.1117/12.260863
Event: BiOS Europe '96, 1996, Vienna, Austria

Abstract

Multispectral images can provide useful information for objective diagnosis, control of the effect of therapy and for a patient-specific optimization of therapy regime in ophthalmology. Laser scanner systems have the advantage of a high radiation power also in case of small spectral bandwidth. Additionally, the flying spot principle reduces the irradiation of the patient. Commercial laser scanner ophthalmoscopes (LSO) are developed till now only for qualitative, visual interpretation. Maximal four fixed wavelengths are available with a stabilized radiation power. Using the spectral properties of fundus pigments like xanthophyll, rhodopsin or of pathological alterations, e.g. hard exudates, its optical density or local distribution can be determined in this way before and after therapy. As also three wavelengths can be chosen which are best suited for determination of oxygen saturation (OS) in the blood, the validity of the 3-(lambda) -method for 2D calculation of OS can be tested. These investigations are first steps in functional diagnosis of the metabolism in the human ocular fundus.

Citation Download Citation

Dietrich Schweitzer, B. Kalve, Lutz Leistritz, Mateusz Scibor, and Martin Hammer "Laser scanner ophthalmoscope with free selectable wavelength", Proc. SPIE 2930, Lasers in Ophthalmology IV, (5 December 1996); https://doi.org/10.1117/12.260863

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