3.1.4 eye anatomy

• Key components of the eye

  A) suspensory ligament

  B) cornea

  C) iris

  D) pupil

  E) ciliary muscle

  F) lens

  G) sclera

  H) retina

  I) optic nerve

  
• Suspensory ligaments

  • connect ciliary muscles to the lens
• Ciliary muscles

  • change the shape of the lens
• Iris

  • controls pupil diameter
• Pupil

  • hole in the centre of the iris
• Retina

  • full of receptor cells
  • sensitive to both brightness and colour of light
• Optic nerve

  • transmit visual information as electrical impulses from the retina to the brain
• Sclera

  • white part of the eye
  • protects eye from injury
  • opaque outer layer