Two people have blurred vision. Person R has a cloudy lens. Person S has a transparent lens but cannot focus nearby objects on the retina.
Which pair of treatments is most appropriate?
R: lens replacement; S: convex spectacles
R: lens replacement; S: concave spectacles
R: convex spectacles; S: lens replacement
R: concave spectacles; S: lens replacement
42 exam-style questions on Edexcel GCSE Biology 2.4 The eye, covering 2.4.1 Structure and function of the eye and 2.4.2 Eye defects and their correction. Each one has a worked solution and a mark scheme showing where the marks go.