ABO Study Guide Binder

  1. Fibrious Tunic
    Outer layer of eye. Consists of Sclera & Cornea
  2. Vascular Tunic
    Middle layer of eye. Provides nourishment. Consists of Iris, Choroid & Ciliary Body.
  3. Nervous Tunic
    Inner layer of eye. Consists of Retina.
  4. Anterior Chamber
    The volume between Cornea & Iris.
  5. Posterior Chamber
    The Volume between Iris & Lens
  6. Aqueous Humor
    The liquid that both chambers contain. This liquid is produced by the Ciliary Body. It maintains the pressure of the eye & provides nutrients to the Cornea & Lens.
  7. Canal Of Schlemm
    Constantly draining the Aqueous Humor.
  8. Vitreous Chamber
    Greatest volume of the eye. Takes up 4/5 of the eye. It is found between the Retina & the lens. Filled with Vitreous Humor.
  9. Vitreous Humor
    Maintains the eye's shape.
  10. Cornea
    Transparent dome shaped where light enters. Has 5 layers. Epithelium, Bowman's Membrane, Endothelium, Descemet's Membrane & Stroma.
  11. Epithelium
    Quickly regenerates.
  12. Bowman's Membrane
    Tough. Difficult to penetrate barrier.
  13. Endothelium
    Inner most layer, removes water from Cornea
  14. Stroma
    Middle layer between two membranes. Makes up 90% of thickness in Cornea.
  15. Pupil
    Light passes through this.
  16. Iris
    Controls the amount of light that enters the eye. The colored part of the eye. Has two muscles. The Dilator Muscle & Sphinctor Muscle.
  17. Dilator Muscle
    Opens the pupil allowing more light.
  18. Sphinctor Muscle
    Closes the pupil. Restricting light.
  19. Crystalline Lens
    Focuses light on the Retina.
  20. Accommodation
    The process of focusing on objects based on the distance.
  21. Ciliary Body
    Surrounds the lens. Helps lens achieve accommodation.
  22. Zonules
    Attaches Ciliary body to lens through fibrious strands called Zonules.
  23. Retina
    Consists of photoreceptor cells called rods and cones.
  24. Rods
    Mainly for night vision and peripheral vision.
  25. Cones
    Primary function of detail & color. There are about 6 million in the Retina.
  26. Fovea
    Center of the Retina. Where most of the cones are placed.
  27. Emmetropia
    Normal Vision
  28. Myopia
    Near sighted. The eye is longer than normal, curve of the cornea is too steep so light comes to focus in front of the retina. Corrected with a minus lens. Can see objects at near.
  29. Hyperopia
    Far Sighted. The eye is shorter than normal, the curve is too flat so light comes to focus behind the retina. Corrected with a plus-powered lens. Can see objects at a distance.
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