Regulating the size of the pupil.
What is the iris responsible for?
What is the pupil responsible for?
It has photoreceptors for vision
What is the retina responsible for?
They support the eyeball.
What are the aqeous and vitreous humour responsible for?
They allow black and white vision in dim light.
What are rods responsible for?
They allow colour vision in bright light.
What are cones responsible for?
It is an area of densely packed cone cells where vision is most accurate.
What is the fovea responsible for?
It focuses light rays.
What is the lens responsible for?
It protects and supports the eyeball.
What is the sclera responsible for?
Focusing begins here.
What is the cornea responsible for?
It absorbs stray light.
What is the choroid responsible for?
It keeps the eye moist.
What is the conjunctiva responsible for?
It transmits messages to the brain.
What is the optic nerve responsible for?
It protects the eye.
What is the eyelid responsible for?
They synapse with a bipolar neurone.
What happens when rod/cone cells receive a stimulus?
The ganglion cell of the optic nerve.
Where does the bipolar neurone carry impulses to?
Where do the ganglion cells of the optic nerve carry impulses to?
What are rod cells sensitive to?
How many types of rod are found in the retina?
What are cone cells sensitive to?
How many types of cone cell are found in the retina?
The impulses from how many rod cells pass to a single nerve fibre in the optic nerve?
The impulses from how many cone cells pass to a single nerve fibre in the optic nerve?
There are fewer light sensitive cells here.
According to edge enhancement, why do you see grey in your peripheral vision?
You are using your fovea, which has a high concentration of light senitive cells.
Why, when you try to look at the grey areas in a Hermann grid can you only see white?
The optic chiasma.
What is contralateral processing due to?
In the left side of the brain.
Where is information from the right half of the visual field processed?
In the right side of the brain.
Where is information from the left half of the visual field processed?
It is inverted and reversed.
What is wrong with the image received by the visual cortex?
The Cerebral Cortex.
What part of the brain builds up a complete visual image?