The Senses

• Pain
• Pressure
• Touch
• Temperature

• Equalise air pressure

• Hearing

• Balance

• Protects against infection

• Tough protective outer layer of eye

• Transparent section that allows light to enter

• Prevents internal reflection of light inside the eye

• Controls the size of the pupil

• Lets light into the back of the eye

• Focuses light on the retina

• Controls shape of the lens

• Converts light into nerve impulses

• Provides colour to vision

• Contains no rods or cones

• Carries impulses from rods and cones in the retina to the brain

• Holds the front of the eye (cornea) in shape

• Fills rear of the eye
• Gives shape to the eye

6 million

• Colour

• Bright light

• Fovea

120 million

• Black and White

• Dim Light

• Retina

• Short sighted

• Cant see distant objects

• Laser eye surgery