• saccadic movement, 1
• scanning, 1, 2, 3, 4, 5, 6, 7, 8
• sclera, 1, 2, 3
• searching, 1, 2, 3, 4
• shifting, 1, 2, 3, 4, 5, 6, 7
• short-sightedness, see myopia
• sleep, 1
• smooth muscle, 1, 2
• Snellen, Hermann, 1
• spontaneous attention, 1
• squint, 1, 2
• squinting, 1, 2, 3
• stereo vision, see depth perception
• strain, 1, 2, 3, 4, 5, 6
• string fusion, 1
• striped muscle, 1, 2
• sunglasses, 1, 2, 3
• sunning, 1, 2, 3, 4
• swinging, 1, 2, 3, 4