The eye
- Created by: blloob1
- Created on: 03-05-14 16:43
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- The Eye
- near and far points
- The near point is the closest distance that the eye can focus on
- for adults thats 25cm
- As the eye focuses n closer objects its power increases
- the lens changes shape and the focal length decreases
- but the distance between the lens and the image stays the same
- the lens changes shape and the focal length decreases
- The near point is the closest distance that the eye can focus on
- cameras
- light from the object travels to the chamera and is reflected by the lens forming the image on film
- the image on the film is real because the light rays actually meet there
- The image is smaller then the object because the objects a lot futher away than the focal length lens
- the image is inverted
- the image is inverted
- The image is smaller then the object because the objects a lot futher away than the focal length lens
- the image on the film is real because the light rays actually meet there
- light from the object travels to the chamera and is reflected by the lens forming the image on film
- near and far points
- basic structure of the eye
- The Eye
- near and far points
- The near point is the closest distance that the eye can focus on
- for adults thats 25cm
- As the eye focuses n closer objects its power increases
- the lens changes shape and the focal length decreases
- but the distance between the lens and the image stays the same
- the lens changes shape and the focal length decreases
- The near point is the closest distance that the eye can focus on
- cameras
- light from the object travels to the chamera and is reflected by the lens forming the image on film
- the image on the film is real because the light rays actually meet there
- The image is smaller then the object because the objects a lot futher away than the focal length lens
- the image is inverted
- the image is inverted
- The image is smaller then the object because the objects a lot futher away than the focal length lens
- the image on the film is real because the light rays actually meet there
- light from the object travels to the chamera and is reflected by the lens forming the image on film
- near and far points
- Cornea
- is a transparent window with a convex shape
- It also has a high relective index
- the cornea dose most of the eyes foucusing
- Iris
- the coloured part of the eye
- made up of muscels that controle the size of the pupil the hole in the middle of the iris
- this controles the intensity of light that enters the eye
- The lens
- the lense changes shape to focus lgiht from objects at varying distances
- its connected to the ciliary muscles by the suspensory ligaments and when the ciliary muscles contract tenshion is released and the lens takes on a flat more spherical shape
- when they relax the suspensory ligaments oull the lens into a thinner flatter shape
- Retina
- which is covered in light sensitive cells
- These cells detect light and send signals to th brain to be interprited
- images are formed on the retina
- which is covered in light sensitive cells
- The Eye
- the lense changes shape to focus lgiht from objects at varying distances
- The far point is the furthest distance that the eye can focus comftably
- for normal sighted people thats infinity
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