4.11 Flashcards
1
Q
What is short-sightedness called?
A
Short-sightedness is called ‘myopia’. This is caused by a long eye ball where the focal point falls short of
the retina.
2
Q
How is myopia corrected?
A
Myopia is corrected with concave lens glasses.
3
Q
What is long-sightedness called?
A
Long-sightedness is called ‘hyperopia’. This is caused by a short eye ball where the focal point passes
the retina.
4
Q
How is hyperopia corrected?
A
Hyperopia is corrected using convex lenses.
5
Q
What are cataracts and how are they corrected?
A
Cataracts are cloudy lenses that prevent light from entering the eye. They can be corrected with surgery.
6
Q
What is astigmatism?
A
Astigmatism is a football-shaped cornea that causes blurry vision. It is corrected with prescription
glasses.
