Eye defects (AQA GCSE Biology): Quizzes
📚Quizzes
Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What does myopia (short-sightedness) mean?
What does myopia (short-sightedness) mean?
Near objects clear, distant blurred
Where does light focus in someone with myopia?
Where does light focus in someone with myopia?
In front of the retina
Which is a common cause of myopia?
Which is a common cause of myopia?
The eyeball is too long
What type of lens is used to correct myopia?
What type of lens is used to correct myopia?
Concave lenses
How do concave lenses correct myopia?
How do concave lenses correct myopia?
By diverging light rays
What does hyperopia (long-sightedness) mean?
What does hyperopia (long-sightedness) mean?
Distant objects clear, near blurred
Where does light focus in someone with hyperopia?
Where does light focus in someone with hyperopia?
Behind the retina
What type of lens is used to correct hyperopia?
What type of lens is used to correct hyperopia?
Convex lenses
What is the shape of convex lenses?
What is the shape of convex lenses?
Thicker in middle, thinner at edges
What is a cataract?
What is a cataract?
Cloudy or less transparent lens
How are cataracts treated?
How are cataracts treated?
Remove cloudy lens, insert artificial
What is the age-related condition affecting near focus called?
What is the age-related condition affecting near focus called?
Presbyopia