The Eye mindmap

A mindmap on the eye.

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  • Created by: zavabia
  • Created on: 09-10-13 19:22
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  • The Eye as an Organ
    • Vision
      • Rods
        • Provide black and white colour
        • Only connected to one sensory neurone
        • Great sensitivity in low light, but not very sharp images
      • Cones
        • Provide detailed images in colour.
        • Images only visible in high light
        • Sensitive to Red, Green and blue.
        • The connections to the optic nerve make them more intensive.
      • Pigment
        • Layered Pigment
        • Prevents multiple or blurred images
          • Layered Pigment
    • Parts of the Eye
      • Lens
        • Close object - Refracts light, cilliary muscles contract; lens becomes short and fat.
        • Distant object: Light is less refracted, ciliary muscles relax; lens becomes long and thin.
      • Ciliary muscles
        • Close object - Refracts light, cilliary muscles contract; lens becomes short and fat.
        • Distant object: Light is less refracted, ciliary muscles relax; lens becomes long and thin.
      • Sclera - tough outer coat which protects the eye
      • Retina - Contains light sensitive cells (rods and cones). produces a smaller inverted image.
      • Fovea - Greatest density in cones and works best in bright light.
      • Optic nerve - Composed of sensory neurones that carry nervous impulses to the visual centre at the rear of the brain, which then reverts the image.
      • Blind spot - the exit point for the opric nerve. carries the nervous impulses to the brain.
      • Cornea - Transparent layer that is responsible for the refraction in the eye.
      • Iris - Coloured part of the eye, which expands and contracts to control the amount of light which enters the eye. This is a REFLEX ACTION.
    • The Humours
      • Aqueous Humour - watery fluid that supports the cornea.
      • Parts of the Eye
        • Lens
          • Ciliary muscles
            • Sclera - tough outer coat which protects the eye
            • Retina - Contains light sensitive cells (rods and cones). produces a smaller inverted image.
            • Fovea - Greatest density in cones and works best in bright light.
            • Optic nerve - Composed of sensory neurones that carry nervous impulses to the visual centre at the rear of the brain, which then reverts the image.
            • Blind spot - the exit point for the opric nerve. carries the nervous impulses to the brain.
            • Cornea - Transparent layer that is responsible for the refraction in the eye.
            • Iris - Coloured part of the eye, which expands and contracts to control the amount of light which enters the eye. This is a REFLEX ACTION.
          • Vitreous humour - a jelly like substance that helps to keep the shape of the eyeball and keep the retina in place.

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