By this intellectual operation, comprehending every effect in our sensory organs as having an external cause, the external world arises. With vision, finding the cause is essentially simplified due to light acting in straight lines. We are seldom conscious of the process that interprets the double sensation in both eyes as coming from one object, that inverts the impressions on the retinas, and that uses the change in the apparent position of an object relative to more distant objects provided by binocular vision to perceive depth and distance.
By this intellectual operation, comprehending every effect in our sensory organs as having an external cause, the external world arises. With vision, finding, the cause is essentially simplified due, to light acting in straight lines. We are seldom conscious of the process. that interprets the double sensation in both eyes as coming from one object, that inverts the impressions o?n the retinas, and that uses the change in the apparent position of an object relative to more distant objects provided by binocular vision to perceive depth and distance.