1. A method of measuring potential eyestrain while viewing a three-dimensional (3D) presentation, the method comprising: acquiring a first image and a second image from a first segment; estimating disparity of at least one point in the first image with at least one corresponding point in the second image; estimating disparity transition of a sequence of first and second images; and determining potential eyestrain while viewing the 3D presentation based on the disparity and the disparity transition of the sequence of the first and second images, the step of determining potential eyestrain further comprising: determining an instant eyestrain function for each frame of a sequence of first and second images; and applying a decaying factor to the instant eyestrain function for each frame of the sequence of first and second images.