A man is short-sighted. A doctor finds that his eyeball is a normal length but his cornea is too curved.
Explain why the shape of the man's cornea causes him to be short-sighted.
The doctor suggests laser eye surgery.
Explain how laser eye surgery would correct the man's vision.
The man's daughter is long-sighted because her cornea is not curved enough.
Suggest how laser eye surgery would need to be different for her.
Give one risk of laser eye surgery.
42 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.