A short-sighted person's cornea is reshaped during treatment. After treatment, distant objects are focused on the retina without spectacles.
Which change explains the improvement?
The cornea refracts less strongly, moving the focus forwards onto the retina.
The cornea refracts more strongly, moving the focus backwards onto the retina.
The cornea refracts less strongly, moving the focus backwards onto the retina.
The cornea refracts more strongly, moving the focus forwards onto the retina.
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.