A person has a cataract and short-sightedness. Concave spectacles bring rays from distant objects to a focus on the retina, but vision remains misty.
Which explanation accounts for the remaining problem?
The spectacles correct refraction, but the cloudy lens still scatters light.
The spectacles correct refraction, but damaged cone cells still scatter light.
The spectacles remove lens cloudiness, but the eyeball remains too short.
The spectacles remove lens cloudiness, but the pupil remains too narrow.
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.