How does the lens change to focus on close objects?
It becomes thicker
How does the lens change to focus on far objects?
It becomes thinner
Why are children in developing countries at a greater risk of becoming blind?
Disease and malnutrition
The flexible convex structure behind the iris and pupil is called...
The lens
The place on the retina where the optic nerve is attached and which cannot detect light is called...
The blind spot
An opaque tissue surrounding the cornea is called...
Sclera
A transparent tissue covering the iris and pupil is called...
The cornea
The inner lining of the back of the eye containing light sensitive rods and cones is called...
The retina
Which type of lens should a person use if they are far-sighted?
Convex
How can a laser be used to correct vision problems?
1. Reattach retina 2. Reshape cornea 3. Remove cataracts 4. Stop bleeding
What is the job of the optic nerve?
Send electrical signals to the brain
Which structure of the eye does the most focussing?
Cornea
What part of the eye is the "colour" of the person's eye?
Iris
Which part of the eye does light enter?
Pupil
What is it called when the pupil gets bigger?
Dialating
What causes astigmatism?
Irregularly shaped cornea
