The retina is a thin film coating the inside surface of the eye-ball. The retina “sees” via millions of cells called rods and cones and sends the information from these cells via your optic nerve to your brain. The centre of your retina, the macula, provides the sharp, detailed vision used by your central vision, and the outer retina provides your peripheral vision. Most retinal conditions will cause symptoms (eg. a shadow in your peripheral vision or distortion in your central vision), however some are slowly progressing, so it isn’t until you have an eye examination that the Optometrist or Ophthalmologist notes a problem.