Correcting Vision Flashcards
1
Q
What are the causes of short sightedness?
A
Eyeball too long or lens unable to focus
2
Q
What lens can fix long sight?
A
Convex lens
3
Q
What lens can fix short sight?
A
Concave lens
4
Q
What is another way to correct eye problems?
A
Laser surgery
5
Q
What type of power does a convex lens have?
A
Positive
6
Q
What type of power does a concave lens have?
A
Negative
7
Q
What are the causes of long sightedness?
A
Eyeball too short or lens unable to focus
