Perception of distance Complete the starter activity

Fiction We see something that is not actually there. Ambiguity When there is more than one Interpretation of the image on the retina Paradox This is a two dimensional image which cannot Exist as a three dimensional image Distortion This is when an Image appears to be Larger or a Different shape than It actually is

Connect the learning What is the difference between sensation and perception

Learning objective To be able to explain how we perceive depth

Input Distance refers to the ways in which perceive how far away objects are. This is also referred to as depth perception. The image that falls on the retina is two dimensional, so how can we perceive depth, which is three dimensional? We can do this using information from both eyes (binocular cues) or one eye (monocular cues).

Binocular depth cues Retinal disparity: Because each eye looks at the world from a different Viewpoint, we get two different views of an object. With both eyes open, the brain is receiving these two sets of information which create retinal disparity. The amount of retinal disparity gives an indication of the distance away of the object. Summarise the information Into bullet points

Ocular convergence The nearer the object is, the more the eyes turn inwards (convergence) in order to the object. Information passes From the eye muscles to the brain. It tells the brain how Much the eyes have turn inwards and therefore helps Us to perceive how far away the object is.

Demonstrate How do we perceive depth using Binocular cues? Retinal disparity Ocular convergence

Plenary Have you achieved the objective? To be able to explain how we perceive depth