IGCSE Edexcel Biology: The Eye
Sensory neurones that connect the eye to the brain
Tough white outer layer that protects the eye
Transparent layer at the front of the eye that refracts light.
Dark hole at the front, centre of the eye
Elastic disk, that changes shape to allow fine focusing of light
Coloured radial and circular muscles that control the size of the pupil
Red photosensitive layer at the back of the eye; contains rods and cones.
Dark layer behind the retina that absorbs light stopping it from reflecting
Maintains the shape of the front of the eye
Maintains the shape of the main sphere of the eye
Connects/anchors the lens to the ciliary muscles
Contracts and relaxes to change the thickness and curve of the lens
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