Factors Affecting Cirrus-HD OCT Optic Disc Scan Quality: A Review with Case Examples

Figure 5

Motion artifacts and scan circle displacement. Pair of Cirrus HD-OCT left optic disc scans collected on the same day ((a)-(b)). In the scan with a motion artifact passing through the optic disc ((b) arrow), printout results suggest superotemporal retinal nerve fiber layer (RNFL) thinning not confirmed by color fundus photography ((d)-(e)). After realignment (f), this scan (purple scan circle) shows temporal displacement above the motion artifact and nasal displacement below the motion artifact. Note RNFL thickening in the sectors moved closer to the optic disc and RNFL thinning in the sectors moved away from the optic disc margin ((c)-(d)). SS: signal strength.

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