The eye (AQA GCSE Biology): Flashcards
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Practise the cards
15 cards from this deck
What type of organ is the eye?
What type of organ is the eye?
Sense organ
What does the eye detect?
What does the eye detect?
Light intensity and colour
What is the function of the sclera?
What is the function of the sclera?
Tough, white outer layer that protects the eye
What is the cornea?
What is the cornea?
Clear, transparent front part light passes through first
What is the function of the iris?
What is the function of the iris?
Controls the size of the pupil
What is the function of the retina?
What is the function of the retina?
Contains light-detecting cells (receptors)
What is the function of the optic nerve?
What is the function of the optic nerve?
Carries electrical signals from eye to brain
Pathway of light through the eye
Pathway of light through the eye
Cornea → pupil → lens → retina
Function of rods
Function of rods
Work in dim light, detect how light or dark something is
Function of cones
Function of cones
Work in bright light and detect different colours
Definition of accommodation
Definition of accommodation
Changing lens shape to focus on objects at different distances
Lens shape when focusing on near objects
Lens shape when focusing on near objects
Thicker
Lens shape when focusing on distant objects
Lens shape when focusing on distant objects
Thinner
Pupil size in bright light
Pupil size in bright light
Smaller (constricts)
Pupil size in dim light
Pupil size in dim light
Larger (dilates)