2 Introduction Instructions for UseCLARUS® 5002.6 System Overview24 / 192 2660021171806 Rev. A 2019-01• True color reflectance imaging• Fundus autofluorescence with green or blue excitation (FAF-Gand FAF-B)• Stereo imaging• External eye imaging2.6.1.1 Principles of OperationUsing a monochromatic camera, a broad line of illumination scansacross the retina.Red, green and blue Light Emitting Diodes (LEDs) sequentiallyilluminate to generate true color images. The broad bandwidth ofLEDs gives a true color rendering. Blue and green LED illuminationenables Fundus AutoFlourescence (FAF) imaging.By illuminating only a narrow strip of the retina at a time, theillumination stays out of the viewing path, keeping haze andfluorescence of the anterior segment out of the retinal image andallowing a clear view of much more of the retina than the annular-ring illumination used in traditional fundus cameras. The designallows a single exposure to image an area of the retina previouslycovered by the 7-fields in the Early Rreatment of DiabeticRetinopathy Study (ETDRS).2.6.1.2 Key FeaturesScan Type Options:• True color• Fundus autofluorescence with green excitation• Fundus autofluorescence with blue excitation• Stereo imaging• External eye imagingField of View Options:• Widefield: A single image with a 133° FOV when measuredfrom the center of the eye.(90° when measured as described in ISO 10940).• Ultra-widefield: Two images stitched together into a montagewith a 200° FOV when measured from the center of the eye.(135° when measured as described in ISO 10940).• AutoMontage: a 4-scan montage using preset fixation targets.• Montage: 2-6 widefield images stitched into a single,combined retina image.
