At an athletics event, a person can read a programme held close to their eyes, but the distant scoreboard is blurred.
Tests show that light from the scoreboard is focused in front of the retina.
Name this focusing defect.
The optician tests two spectacle lenses.
| Lens | Effect on light rays before they enter the eye |
|---|---|
| P | Spreads the light rays out |
| Q | Brings the light rays together |
State which lens should be used and name the type of lens.
Another treatment changes the shape of the cornea to alter how much it refracts light.
Name this treatment.
4 exam-style questions on AQA GCSE Biology 5.2.3 The eye. Each one has a worked solution and a mark scheme showing where the marks go.