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Assignment 3 (Gross Anatomy of the Eye (Iris (It is a Sphincter muscle (It…

- - - - "white"
      - Made of Dense connective tissue
      - Gives shape
      - Anchor for extrinsic eye muscle
    - - Allows light into the eye
      - Helps to focus light on the retina
      - Transparent
  - - - Smooth muscle
      - Change shape of lens to focus distant/near objects
      - Continuous with the choroid
    - - Absorbs light; prevents light from scattering
      - Nourishes other layers; retina
      - Black
  - - - Most Abundant
      - Sensitive to light
    - - Sensitive to color
  - - - It dilates/constricts pupil to allow more/less light to enter eye
  - - - Very thin
      - Photorecptors location
      - Axons from retina converge to form optic nerve
      - Location of
        
        Macula Lutea
        
        Posterior pole
        
        The center of the macula Lutea is the Fovea centralis
        
        Fovea centralis
        
        Light focused here
        
        There are only cones
        
        Optic Disc
        
        No photo receptors
        
        It is the "Blind spot"
  - - - Clear and "thick"
      - Supports retina and lens
      - Filled with vitreous humor
      - Maintain pressure in eye
      - Posterior chamber
        
        From Iris to lens
    - - Maintain pressure in eye
      - nourishes
      - Filled with aqueous humor
      - Location
        
        Posterior segment to cornea
      - Anterior Chamber
        
        From cornea to iris
- - - - Sensitive to stimuli from internal organs
    - - Sensitive to stimuli from muscles, tendons, ligament, joints, stretch
    - - sensitive to stimuli from enviorment
      - Location: skin, special senses
- - - - sensitive to light
    - - Sensitive to chemicals
      - Example:smelling, taste
    - - sensitive to temperature changes
    - - Sensitive to pain
    - - Sensitive to touch, pressure, vibration, stretch
      - Baroreceptor
        
        measure blood pressure