WorksheetsIGCSE Topic 12 - The Human Eye
Total questions: 16
Worksheet time: 8mins
What is the name of the tough, white outer layer of the eye?
Sclera
Choroid
Cornea
Conjunctiva
Which layer inside the eye contains rods and cones?
Choroid
Sclera
Retina
Optic nerve
Which two parts of the eye help to focus light rays?
Lens & retina
Cornea & iris
Iris & retina
Lens & cornea
Which layer of tissue prevents light being reflected back out of the eye?
Cornea
Choroid
Sclera
Blind spot
Which muscle controls the shape of the lens?
Radial muscle
Circular muscle
Ciliary muscle
What happens when the radial muscle contracts?
The pupil constricts.
The pupil dilates.
The lens is stretched thin.
The lens becomes more round.
Which part of the eye contains the highest concentration of light receptor cells?
Fovea
Blind spot
Optic nerve
Choroid
What happens when you focus on a distant object?
The lens becomes more round.
The radial muscle contracts.
The suspensory ligaments become loose.
The ciliary muscle relaxes.
What is the correct route that light rays take as they enter the eye?
Cornea => conjunctiva => pupil => retina
Cornea => lens => pupil => retina
Conjunctiva => cornea => lens => retina
Conjunctiva => lens => pupil => retina
Where does the optic nerve attach to the eye?
Fovea
Ciliary muscle
Choroid
Blind spot
Which structure contains cells that are sensitive to light?
A
B
C
D
Which part of the eye contains muscles that change the size of the pupil?
A
B
C
D
X is a muscle. What effect does it have when it contracts?
It causes the pupil to constrict.
It causes the pupil to dilate.
It pulls on the lens, making it thinner.
It reduces the pull on the lens, making it more round.
The diagram shows the muscles that control the size of the pupil in an eye. How do the muscles make the pupil constrict?
Both the circular and the radial muscles contract.
The circular muscle contracts and the radial muscle relaxes.
The circular muscle relaxes and the radial muscle contracts.
Both the circular and radial muscles relax.
Which part of the eye converts light energy into a nervous impulse?
A
B
C
D
The diagram shows a section through the front of the eye. Where are muscles found?
X only
X, Y and Z
W and Y
W and X
