Artifacts on OCT
Artifacts can occur during image acquisition or analysis due to software, patient or operator factors. Artifacts may affect the qualitative or quantitative interpretation of images and are therefore important to identify.
▶ Mirror artifact (Fig 3.1.1): this artifact is unique to SD-OCT. It occurs when the area of interest to be imaged crosses the zero delay line and results in an inverted image. In practical terms, this happens when the OCT machine is pushed too close to the eye, or when the eye has pathology (e.g. retinoschisis or high myopia) in which a large axial range has to be imaged. The resulting image is inverted, partly inverted or may possibly have poor resolution.