CONE CELLS

• WHAT IMAGE DO CONE CELLS PRODUCE?

  full colour
• WHY CAN CONE CELLS PRODUCE COLOUR IMAGES?

  three types of pigment, each receptive to different wavelengths of light
• HOW MANY CONE CELLS ARE THERE PER EYE?

  6 million
• WHERE ARE CONE CELLS FOUND?

  fovea
• VISUAL ACUITY OF CONE CELLS?

  good
• SENSITIVITY TO LIGHT OF CONE CELLS?

  not sensitive to low intensity light
• WHAT DO CONE CELLS HAVE?

  no convergence
• WHY DO CONE CELLS NOT HAVE CONVERGENCE?

  one cone cell links to one bipolar cell
• WHAT DOES THE LACK OF CONVERGENCE MEAN FOR CONE CELLS?

  less likely to exceed threshold, can therefore only respond to high intensity light
• PHOTOSENSITIVE PIGMENT IN CONE CELLS?

  iodospin
• WHAT DOES IODOSPIN REQUIRE?

  higher intensity light for breakdown to create a generator potential
• WHAT DOES THE LACK OF CONVERGENCE MEAN?

  two separate impulses make it easier to differentiate different wavelengths