12.1 Definitions

Question 1

Optometrist

Answer 1

A trained professional who does eye tests

Question 2

Ophthalmologist

Answer 2

Physician who specializes in eye care

Question 3

Cornea

Answer 3

The outer surface layer of your eye that is made up of a transparent layer of tissue

Question 4

Pupil

Answer 4

Transparent area in the centre of the eye that allows light to pass into the eye

Question 5

Iris

Answer 5

Circular coloured band of muscle in the eye thatcontrols the size of the pupil and the amount of light that enters

Question 6

Retina

Answer 6

Inner lining at the back of the eye that acts as a projection screen for light rays entering the eye

Question 7

Photoreceptors

Answer 7

Cells in the retina that are sensitive to light

Question 8

Rod cells

Answer 8

Cells located in the retina that help detect shapes and movement in low light situations

Question 9

Cone cells

Answer 9

Photoreceptors cells in the eye that detect colour

Question 10

Blind spot

Answer 10

The place where the optic nerve attaches to the retina

Question 11

Optic nerve

Answer 11

Nerve that connects the eye to the brain

Question 12

Far sighted

Answer 12

People who can see far objects clearly but struggle with close objects

Question 13

Near sighted

Answer 13

People who can see near objects but can’t see far objects

Question 14

Astigmatism

Answer 14

The eyeball is unable to form a clear imitate because of the irregular shape of the cornea or lens

Question 15

Laser eye surgery

Answer 15

A general term for several different kinds of procedures that involve correcting vision by reshaping the cornea using energy from a laser

Question 16

Colour vision deficiency

Answer 16

The ability to distinguish some colours but not others

Question 17

Sclera

Answer 17

The outermost layer and white of the eye

Question 18

Vitreous humour

Answer 18

A thick transparent liquid that fills the center of the eye

Question 19

Lens

Answer 19

Located right behind the Rios yo focus light onto the retina