The Eye mindmap
A mindmap on the eye.
- 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
- Rods
- 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.
- Lens
- 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.
- Lens
- Vitreous humour - a jelly like substance that helps to keep the shape of the eyeball and keep the retina in place.
- Vision
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