Eye

Question 1

Sclera

Answer 1

• White of eye
• Tough protective layer

Question 2

Cornea

Answer 2

• Transparent part of sclera
• Light enters through cornea

Question 3

Iris

Answer 3

• Coloured part of the eye behind the cornea
• Adjusting the iris helps to regulate or adjust light exposure

Question 4

Pupil

Answer 4

• Opening in iris - Black part of eye
• This is controlled with help of iris to control amount of light entering the eye

Question 5

Lens

Answer 5

• Lens behind iris and pupil
• Using the ciliary muscles, it changes its shape to focus light on the retina
• It becomes thinner to focus on distant objects and thicker to focus on the nearby objects.

Question 6

Retina

Answer 6

• Light-sensitive layer with numerous nerve cells
• It converts images formed by the lens into electrical impulses
• These electrical impulses are then transmitted to the brain through optic nerves

Question 7

Optic nerves - cones

Answer 7

• Optic nerve cells sensitive to bright light
• They help in detailed central and colour vision

Question 8

Optic nerves - rods

Answer 8

-Optic nerve cells more sensitive to dim lights
- They help in peripheral vision