Welcome to the Quiz!
This quiz contains 15 questions from a mix of 1 subtopics.
What is the cornea?
The coloured part of the eye
A transparent layer at the front of the eye which refracts light
The gap through which light passes to reach the lens
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The diagram above shows the labelled as 'X'.
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What is the structure labelled X in the image above?
Cornea
Iris
Retina
Ciliary muscle
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What is the pupil?
A transparent layer at the front of the eye which refracts light
The gap through which light passes to reach the lens
The coloured part of the eye
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What is the structure labelled X in the image above?
Ciliary muscle
Suspensory ligament
Lens
Optic nerve
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What are the names of the two types of receptor cells in the retina?
Cube cells
Prism cells
Rod cells
Cone cells
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Which light-sensitive cells in the retina enable you to see in colour?
Cone cells
Rod cells
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The eye is a sense organ. Which two stimuli are the receptor cells of the eye sensitive to?
Temperature
Colour
Light intensity
Vibration
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Which light sensitive cells in the retina enable you to see in the dark?
Cone cells
Rod cells
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The point where light focuses on the retina is called the . This region contains the highest concentration of cone cells and gives the sharpest image.
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What is the purpose of the iris reflex?
To prevent dust from entering the eye
To focus on light from different distances
To ensure the optimum amount of light enters the eye
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When the pupil is very large, do we describe it as 'constricted' or 'dilated'?
Dilated
Constricted
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Which two muscles make up the iris?
Round muscles
Circular muscles
Radial muscles
Linear muscles
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When the eye is exposed to bright light, will the pupil constrict or dilate?
Constrict
Dilate
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What happens to the circular and radial muscles when the pupil constricts?
(Select all that apply)
The radial muscle contracts
The circular muscle relaxes
The circular muscle contracts
The radial muscle relaxes
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