Sight problems Flashcards
1
Q
what does a converging lens do
A
bends rays of light towards one another, bringing them to a point
2
Q
what does a diverging lens do
A
bends rays of light away from each other
3
Q
explain long sightedness, what can long sighted people do
A
may have eyeballs that are too short, or eye lenses that are not powerful enough. this often happens as we get older and the lens does not bend enough focus on distant objects but not near ones.
4
Q
explain short sightedness what can short sighted people do
A
may have eyeballs that are too long, or eye lenses that are too powerful even when the muscles are relaxed. focus on close objects but not distant ones
