A computer model is used to test corrections for two simulated eyes.
Model R has a cornea that refracts light too strongly.
Model S has an eyeball that is too short.
Which changes to the light are needed to correct these defects?
R: the amount of light entering the eye is reduced; S: the amount of light entering the eye is increased
R: the rays are scattered before entering the eye; S: the rays pass through without changing direction
R: the rays are spread out before entering the eye; S: the rays are brought together before entering the eye
R: the rays are brought together before entering the eye; S: the rays are spread out before entering the eye
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.