During a theatre rehearsal, a performer can still see the outlines of scenery in the dimly lit wings. Under bright stage lighting, the performer cannot distinguish red costume labels from green costume labels. Near and distant objects remain sharply focused.
Which change in the eye is most likely?
Cone cells no longer function normally, while rod cells still function.
The lens can no longer become thin, while the retinal cells still function.
The circular muscles cannot contract, while the retinal cells still function.
Rod cells no longer function normally, while cone cells still function.
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.