A detection method and a detection apparatus are provided. The method includes detecting features of a user's right and left eyes in a stereoscopic image pair of the user; detecting the image depths of the right and left eye features in the stereoscopic image pair; and comparing the detected depths. When the difference between the detected depths is less than a threshold difference, detecting the separation of the user's eyes from the separation of the three dimensional positions of the right eye and left eye features is detected. The apparatus includes a feature detector to detect the features of the user's eyes, a depth detector to detect the image depths, a comparator to compare the detected depths, and a separation detector to detect separation of the eyes from the separation of the three dimensional positions of the right and left eye features when the difference is less than the threshold.
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