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Six situations that caused erroneous blink detection by the software. Examples B-F were categorized as “false blinks”: (A) NOim = No image was available because of extreme sunlight, (B) sunlight (e.g., sunlight shining onto the eye), (C) movements (e.g., running), (D) lost pupil (looking downward), (E) lost pupil (looking upward), (F) lost pupil (looking to the side).
