Without correction, light from a nearby label would come to a focus behind a patient's retina. The patient then puts in a convex contact lens.
Which statement explains why the label is now seen clearly?
The contact lens makes the patient's own lens fatter, so the eye itself now refracts the light more strongly.
The contact lens lets more light pass through the pupil, so the label looks brighter and therefore sharper.
The contact lens spreads the light rays apart before they reach the cornea, so they now meet on the retina.
The contact lens bends the light rays together before they reach the cornea, so they now meet on the retina.
135 exam-style questions on OCR GCSE Biology 3.1 Coordination and control – the nervous system, covering 3.1.1 Structure of the nervous system, 3.1.2 Coordinated response, 3.1.3 The reflex arc, 3.1.4 Structure of the eye, 3.1.5 Defects of the eye, 3.1.6 Structure and function of the brain, 3.1.7 Difficulties of investigating brain function, and 3.1.8 Limitations in treating nervous system damage. Each one has a worked solution and a mark scheme showing where the marks go.