the eye ( biology )

Cornea

Bends light into the eye

Lens

Refracts light

Retina

Detects light

Optic nerve

Carries impulses from the receptors to the brain

Pupil

Hole in the middle

Long sighted

Can’t see close up

Short sighted

Can’t see far away

Colour blindness

Occurs when lens is the wrong shape and doesn’t bend the light correctly

Cataracts

Cloudy patch on lens which stops light from being able to enter the eye properly

Cones

Sensitive to different colours but not so good in dim light

Rods

sensitive to dim light but cannot see colour