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Sensory receptors (Based on stimulus type (Chemoreceptor (responds to…

- - - - type of mechanoreceptor, sensitive to blood pressure
- - - - Dense connective tissue
      - anchor site for eye muscles/tendons
      - Gives the eye it's shape
    - - Transparent
      - Lets light in and focuses it
      - Avascular
    - - Choroid
        
        Black
        
        Absorbs light to prevent scattering in eye
        
        Vascular
        
        Nourishes other layers of eye
      - Ciliary body
        
        Continuous with choroid
        
        Muscle that changes shape of lens
      - 3rd tunic, Inner layer
        
        Retina
        
        Contains photorecepters
        
        Tan
        
        Optic Nerve
        
        made of axons from photoreceptors
  - - - Sensitive to light shades
      - the majority of photoreceptors
      - for dim light vision
    - - Gives color vision
      - best in bright light
      - Minority of photoreceptors
  - - - Avascular
      - Focuses light onto retina
      - Changes shape
      - Connected to Ciliary body
    - - Dialates or constricts to control light entering eye
      - Sphincter muscle
      - Pupal is it's opening
    - - Where axons converge to form optic nerve
      - No photoreceptors
    - - Posterior pole, where the majority of light lands in eye
      - place of sharpest vision
      - Contains only cones
      - Fovea centralis
        
        Center of Macula Lutea
  - - - starts posterior to lens and extends posteriorly
      - Vitrous Humor
        
        Fills this cavity
        
        Is a viscous liquid
        
        Transmits light
        
        Supports retina and lens
        
        Maintains pressure in the eye and its shape
    - - Posterior chamber
        
        Iris to posterior segment
      - Anterior chamber
        
        Iris to cornea
      - Divided into 2 sections
      - Aqueas humor
        
        Constantly renewed
        
        watery substance
        
        transmits light
        
        nourishes lens and cornea
        
        Flows from posterior chamber to anterior chamber through iris opening, then drains