lesson 5 how the eye focuses

Question 1

long sightedness is also called what

Answer 1

hyperopia

Question 2

long sightedness can focus on distant objects but cant focus on

Answer 2

near objects

Question 3

how can long sight be treated

Answer 3

by using glasses with convex lenses

Question 4

convex lenses do what

Answer 4

partially focuses the light before entering the eye

Question 5

short sightedness is called what

Answer 5

myopia

Question 6

people with short sightedness can focus on near objects but not

Answer 6

distant objects

Question 7

people with short sightedness eyes are too long so it focuses where on the retina

Answer 7

in front

(people with long sightedness focus behind the retina)

Question 8

short sightedness also occurs when the lens is what

Answer 8

too thick

Question 9

short sightedness can be treated by what

Answer 9

using glasses with concave lenses

Question 10

what do concave lenses do

Answer 10

they partially unfocus the light before it enters the eye

Question 11

instead of glasses people can also use what

Answer 11

hard or soft contact lenses

Question 12

contact lenses refract the light in the same way as what

Answer 12

glasses

Question 13

treatments are also used to fix eye sight like what

Answer 13

laser surgery

Question 14

what is laser surgery used for

Answer 14

to change the shape of the cornea so it refracts the light to a greater or lesser extent

sometimes the lenses inside the eye can be replaced by using an artificial lens