The table shows observations made during an eye examination.
Table
| Test | Observation |
|---|---|
| Light focused on the retina | The person detects the light. |
| Light intensity increased | The pupil remains unusually large. |
| Object distance changed | The lens changes shape normally. |
Which conclusion best fits all three observations?
Receptor detection and light regulation work, but accommodation is impaired.
Accommodation and light regulation work, but receptor detection is impaired.
Receptor detection works, but accommodation and light regulation are both impaired.
Receptor detection and accommodation work, but regulation of light entry is impaired.
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.