The Eye (OCR GCSE Biology A (Gateway Science Suite)): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What type of cells are found in the retina?
What type of cells are found in the retina?
Light sensitive cells
What is the function of the optic nerve?
What is the function of the optic nerve?
Carries impulses from retina to brain
What is the function of the cornea?
What is the function of the cornea?
Allows light through and focuses it
What happens to the pupil in bright light?
What happens to the pupil in bright light?
Becomes smaller
In dim light, which muscles contract to change pupil size?
In dim light, which muscles contract to change pupil size?
Radial muscles
When focusing on a near object, what do ciliary muscles do?
When focusing on a near object, what do ciliary muscles do?
Contract
What shape does the lens become when focusing on near objects?
What shape does the lens become when focusing on near objects?
Thicker and more curved
When focusing on a distant object, what happens to suspensory ligaments?
When focusing on a distant object, what happens to suspensory ligaments?
Tighten
What is the medical term for short-sightedness?
What is the medical term for short-sightedness?
Myopia
In hyperopia (long-sightedness), what is wrong with the lens?
In hyperopia (long-sightedness), what is wrong with the lens?
Too flat
Which type of spectacle lens is used to treat myopia?
Which type of spectacle lens is used to treat myopia?
Concave lenses
How does laser eye surgery treat myopia?
How does laser eye surgery treat myopia?
Reduces cornea thickness