Psycholgy
Perception
Vision | The biological process of seeing | Perception | The psychological process of making sense of an image |
What is perception? * This is how we see and understand the world * The two key things about perception are: 1. How we see distance or depth 2. What goes wrong when we are fooled by an illusion
The structure of the eye
1. Light enters through the cornea. The cornea focuses the light and passes it through the pupil. 2. The lens re-focuses the light that has come through the pupil, projecting the focused image on the retina. 3. Cells in the retina convert the light forming the image to electrical impulses, and the optic nerve takes the signal to the primary visual cortex of the brain. 4. The signals tell our brains about the colour, size and distance of the objects
The Retina * The retina is very important for perceiving images * It is covered in nerve endings * It transmits signals to our brain so we are able to interpret what we see * There are 2 types of cells in the retina- Rods & Cones Rods | Cones | * Are very sensitive to light * They allow us to see in dim lighting conditions * Do you ever think you have seen something in the corner of your eye? * This is just a very subtle hint of light that passes us * Because the retina is so sensitive we see this | * Allow us to see clearly and in detail * They only work in good lighting conditions * They detect colours * This is why we can’t see colours in darkness. The cones can’t work properly |
The Blind Spot
This is the area of the retina where the optic nerve leaves. It has no rods or cones so cannot detect light. There is a blind spot in each eye. Our brain ‘fills’ in the gap so we are never left blind. It does this by filling in with the background surrounding what you can see.
This is the ‘x’ shape in our brain where information from each eye crosses over to the opposite side of the
Vision | The biological process of seeing | Perception | The psychological process of making sense of an image |
What is perception? * This is how we see and understand the world * The two key things about perception are: 1. How we see distance or depth 2. What goes wrong when we are fooled by an illusion
The structure of the eye
1. Light enters through the cornea. The cornea focuses the light and passes it through the pupil. 2. The lens re-focuses the light that has come through the pupil, projecting the focused image on the retina. 3. Cells in the retina convert the light forming the image to electrical impulses, and the optic nerve takes the signal to the primary visual cortex of the brain. 4. The signals tell our brains about the colour, size and distance of the objects
The Retina * The retina is very important for perceiving images * It is covered in nerve endings * It transmits signals to our brain so we are able to interpret what we see * There are 2 types of cells in the retina- Rods & Cones Rods | Cones | * Are very sensitive to light * They allow us to see in dim lighting conditions * Do you ever think you have seen something in the corner of your eye? * This is just a very subtle hint of light that passes us * Because the retina is so sensitive we see this | * Allow us to see clearly and in detail * They only work in good lighting conditions * They detect colours * This is why we can’t see colours in darkness. The cones can’t work properly |
The Blind Spot
This is the area of the retina where the optic nerve leaves. It has no rods or cones so cannot detect light. There is a blind spot in each eye. Our brain ‘fills’ in the gap so we are never left blind. It does this by filling in with the background surrounding what you can see.
This is the ‘x’ shape in our brain where information from each eye crosses over to the opposite side of the