Biology eye

• How many parts are there in the eye

  9
• the eye is a sense organ True/false

  True
• Sclera function 


  It’s tough and supports wall of eye
• Optic nerve function


  carries impulses from receptors on the retina to the brain
• Cornea function


  Is a transparent outer layer, front of the eye and refracts light into the eye
• What does refract mean

  bends
• Iris function


  contains muscles

  and allow it to control diameter of pupil (hole in middle) and how much light enters
• Lens function


  Focuses light onto the retina

  shape of lens controlled by ciliary muscles and suspensory ligaments
• Retina function


  Contains receptors cells which are sensitive to light intensity and colour
• Diagram of eye :