Zeiss CLARUS 500 Instructions For Use Manual page 24

2 Introduction
2.6 System Overview
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• True color reflectance imaging
• Fundus autofluorescence with green or blue excitation (FAF-G
and FAF-B)
• Stereo imaging
• External eye imaging
2.6.1.1 Principles of Operation
Using a monochromatic camera, a broad line of illumination scans
across the retina.
Red, green and blue Light Emitting Diodes (LEDs) sequentially
illuminate to generate true color images. The broad bandwidth of
LEDs gives a true color rendering. Blue and green LED illumination
enables Fundus AutoFlourescence (FAF) imaging.
By illuminating only a narrow strip of the retina at a time, the
illumination stays out of the viewing path, keeping haze and
fluorescence of the anterior segment out of the retinal image and
allowing a clear view of much more of the retina than the annular-
ring illumination used in traditional fundus cameras. The design
allows a single exposure to image an area of the retina previously
covered by the 7-fields in the Early Rreatment of Diabetic
Retinopathy Study (ETDRS).
2.6.1.2 Key Features
Scan Type Options:
• True color
• Fundus autofluorescence with green excitation
• Fundus autofluorescence with blue excitation
• Stereo imaging
• External eye imaging
Field of View Options:
• Widefield: A single image with a 133° FOV when measured
from the center of the eye.
(90° when measured as described in ISO 10940).
• Ultra-widefield: Two images stitched together into a montage
with 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.
Instructions for Use
CLARUS® 500
2660021171806 Rev. A 2019-01