During quality-control testing, a technician passes light through two contact lenses.
Lens T spreads the light rays out before they enter the eye.
Lens U brings the light rays together before they enter the eye.
Which visual difficulties are these lenses designed to correct?
T: nearby objects are blurred but distant objects are clear; U: distant objects are blurred but nearby objects are clear
T: red and green objects are difficult to distinguish; U: vision is cloudy at all distances
T: vision is cloudy at all distances; U: red and green objects are difficult to distinguish
T: distant objects are blurred but nearby objects are clear; U: nearby objects are blurred but distant objects are clear
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.