B1:6 Flashcards
What type of receptors do the eyes contain?
Ones that detect the light
What do these receptors do?
They change the light into electrical impulses and these pass along the optic nerve to the brain
What is binocular vision?
When animals have both eyes facing forward and both eyes are able to focus on the same thing
What does binocular vision enable the animals to do?
They are able to focus and judge distance accurately.
Binocular vision with predators
They are bale to focus and judge distances properly. But they do not have a wide field of view
What is monocular vision?
This is when the animals have eyes on each side of the head.
What does monocular vision enable the animals to do?
The animals have a wider field of view.
Monocular vision with prey
It allows the animals to notice any predators with time to run away. They cannot judge distances very well though
What does the brain do when judging distance?
It compare the images with each eye and If the images are similar, then the brain knows you are looking at something in a distance
What is accommodation?
This is when the lens of the eye changed shape to focus on near or distant objects
How does the ring of ciliary muscle accommodate close viewing?
It contracts
How does the suspensory ligaments accommodate close viewing?
It slackens
How does the lens accommodate close viewing?
It becomes rounded with a fat shape
How does the ring of ciliary muscle accommodate distant viewing?
It relaxes
How does the suspensory ligaments accommodate distant viewing?
It becomes taut
