Depth Perception Flashcards
How much available energy do you use?
20% of available energy at 2% of your mass
What is cognition for?
To help you find food, shelter, procreate, to stop you from; performing actions you cannot do and to stop you doing things that will kill you
During the Cambrian period what did organisms develop the ability to do?
To sense reflected waves, which signalled absence or presence to the organism - this eventually became mechanism to detect predators or prey
What fuelled the evolutionary arms race?
Organisms being able to sense reflected waves .
What does concavity of the eye allow?
To detect the directionality of light by blocking light from other directions on certain points of the retina
What does a fluid filled cavity allow for in the eye?
Allows it to have a spherical shape and therefore a very small pinhole aperture, increasing concavity and directionality detection .
How did tissue evolve to improve the eye?
It covered and protected the eye and a lens developed which allowed for increased aperture .
What benefit is there to a spherical lens?
It bends light differently depending on where the light is coming from- which allows for directionality detection with a larger aperture
And for light to be focused on the retina .
What is the purpose of the eye?
Allows us to detect if something is coming/going e.g. food/predator.
Seeing the future, you see the surface ahead and decide how to react to it .
What is the distal stimulus? (*)
The object that is in the environment
What is the proximal stimulus?
2D image on the back of the retina
Is what we perceive closer to the distal or proximal stimulus ?
The distal stimulus
What is ambiguous in the proximal stimulus?
Size, distance, orientation and shape of the stimulus
What has constant properties?
The distal stimulus and the percept but not the proximal stimulus
When happens to the image on the retina when you move closer to the stimulus?
The image on the retina gets bigger
