The eye

• What type of radiation is light classified as?

  Electromagnetic radiation
• What is a photon?

  A particle of light
• How does light travel?

  In waves
• What is the speed of light?

  299,792,458 m/sec
• What does amplitude refer to in the context of light?

  Intensity of light
• What does wavelength measure?

  Distance between peaks
• What does frequency (Hz) indicate?

  Number of waves passing a point per second
• What is the range of visible light in nanometers?

  380-760 nm
• What emits visible light?

  The sun, lightbulbs, etc.
• What are the main components of the eye's anatomy?

  • Cornea
  • Sclera
  • Pupil
  • Iris
  • Lens
  • Retina
  • Fovea
  • Optic nerve
  • Anterior chamber
  • Posterior chamber
  • Vitreous chamber
  • Extrinsic muscles
  • Intrinsic muscles
• What is the function of the cornea?

  Principal means of focus
• What is the sclera?

  White opaque outer coating
• What is the role of the pupil?

  Allows light to enter the eye
• What is the iris?

  Colored part of the eye
• What is the function of the lens?

  Focuses light onto the retina
• What does the retina contain?

  Photoreceptors and neural circuitry
• What is the fovea?

  Part where the center of an image falls
• What is the optic nerve's function?

  Carries impulses from retina to brain
• What do the anterior and posterior chambers contain?

  Aqueous humor
• What does the vitreous chamber contain?

  Vitreous humor
• What do extrinsic muscles control?

  Eye movement and position
• What do intrinsic muscles control?

  Near focusing and light entry
• What is accommodation in the eye?

  Lens changes shape for focus