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Paper 3Theory (Core)3 marks
The eye contains several parts that work together to allow vision.
Description
Eye Parts and Their Roles
The cornea bends light, the iris controls light entry, the lens focuses light onto the retina, the retina contains light-sensitive receptors including color detectors, and the optic nerve sends signals to the brain.
- a[1]
Identify the part of the eye that controls the amount of light entering through the pupil.
Aim for approximately 1 distinct marking point.
- b[2]
Describe the role of the retina.
Aim for approximately 2 distinct marking points.
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