the eye Flashcards
What is the cornea?
A transparent layer at the front of the eye which refracts light
What is the pupil?
The gap through which light passes to reach the lens
What are the names of the two types of receptor cells in the retina?
cone cells and rod cells
Which light-sensitive cells in the retina enable you to see in colour?
cone cells
The eye is a sense organ. Which two stimuli are the receptor cells of the eye sensitive to?
light intensity and colour
Which light sensitive cells in the retina enable you to see in the dark?
rod cells
The point where light focuses on the retina is called the …
fovea
What is the purpose of the iris reflex?
To ensure the optimum amount of light enters the eye
When the pupil is very large, do we describe it as ‘constricted’ or ‘dilated’?
dilated
which 2 muscles make up the iris?
radial muscles and circular muscles
When the eye is exposed to bright light, will the pupil constrict or dilate?
constrict
What happens to the circular and radial muscles when the pupil constricts?
The radial muscle relaxes and the circular muscle contracts
