A model eye has a converging lens and a screen that represents the retina. When the screen is 24 mm behind the lens, light from a distant object is brought to a sharp focus on the screen. The screen is then moved so that it is 27 mm behind the lens, and the distant object now looks blurred on the screen.
Explain which eye defect the model now represents and how this defect could be corrected.
102 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.