Eye Anatomy

Cross section of the eye

• The cornea is the clear, transparent front layer of the eye through which light passes
  
  
• The iris gives our eyes colour and it functions like the aperture on a camera, enlarging in dim light and contracting in bright light. The aperture itself is known as the pupil
  
  
• The lens helps to focus light on the retina
  
  
• The retina is the innermost layer of the back of the eye. This layer of light-sensitive nerve endings carry the visual impulse to the optic nerve. The macula is the central zone of the retina which provides our most central, acute vision
  
  
• The optic nerve conducts visual impulses to the brain from the retina