Red-Free Imaging

Highlighting Nerve Fiber Layer

Red-free photographs initially used white light illumination with filters to remove the red light. SPECTRALIS^® confocal scanning laser ophthalmoscope (cSLO) with red-free imaging uses blue light to illuminate the retina. This wavelength accentuates the visibility of blood vessels and enhances the contrast of certain structures on the surface of the retina, rendering them easier to see compared to white light illuminated images.

SPECTRALIS red-free imaging highlights structures such as the retinal nerve fiber layer and internal limiting membrane as well as conditions including retinal folds, cysts, epiretinal membranes, and pseudoxanthoma elasticum.

SPECTRALIS red-free, SD-OCT and BluePeak™ blue laser autofluorescence can help provide clinicians a more comprehensive view of glaucoma and pathologies affecting the inner retinal layers.