A technician inspects components in a brightly lit laboratory. The technician completes the same tests using objects at two distances.
| Test | Distance from technician | Number identified correctly out of 12 |
|---|---|---|
| read small black symbols | 25 cm | 12 |
| read small black symbols | 5 m | 12 |
| identify whether lights are red or green | 25 cm | 6 |
| identify whether lights are red or green | 5 m | 7 |
Explain what the results suggest about the cause of the technician's difficulty and predict whether spectacles would correct this difficulty.
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.