How your eyes are made
Your eyes play a crucial role in almost everything you do. To understand how you are able to see the world around you, it is helpful to understand the anatomy of the human eye.


Anatomy of the human eye

Your eyes are made up of a number of components. The main ones are:

  • Pupil: The black hole in the middle of your eye that allows light in
  • Iris: The coloured part of your eye that controls the amount of light passing through the pupil
  • Sclera: The white part of your eye
  • Conjunctiva: A thin layer of tissue lining the eyelid and eyeball that protects your eye and keeps it moist
  • Cornea: A transparent dome that protects the iris and pupil
  • Crystalline lens: A transparent disc behind the iris
  • Retina: The back of your eye that contains millions of photoreceptors (sensors that convert light into electric signals)
  • Macula: A small spot near the middle of the retina that is responsible for central vision
  • Vitreous humour: A jelly-like substance that fills the middle of your eye, giving it form and shape
  • Optic nerve: The nerve at the back of your eye that carries signals from the retina to the brain
  • Aqueous humour: A clear fluid in the space between the iris and the cornea to maintain eye pressure and give the front of your eye its rounded shape

To find out how these different components work together to enable you to see, go to how eyesight works.

Take care of your vision
Visit your optician regularly to have your eyes examined. In between examinations, if you notice a change in or are concerned about your eyesight, contact your nearest Hoya optician. Hoya’s lenses offer vision correction and its coatings/treatments can also protect your eyes. Detecting and treating problems early can help maintain good vision for the rest of your life.