# data[].attributes.body
The diagram shown here, not only shows how a digital camera functions but also helps us identify some of the similarities between cameras and eyes.

# data[].attributes.body
The sensors in cameras detects light falling on it because the energy transferred by the light causes electrical changes. More older cameras used something called a film to record every image that is taken. However, when light hits the photographic film causes chemical changes that become permanent.

# data[].attributes.body
This is a labelled diagram of how the eye works to see an image of something or someone.

# data[].attributes.body
Light reaching the eye is refracted as it passes through the cornea, which focuses the light. Lens also helps focus light too.

# data[].attributes.body
Eyes work similarly to cameras. The image that forms in the retina is upside down, that is because the front part of your eye is curved and therefore it bends (refracts) light. Cameras also inverts the image to be upside down. This refers to all cameras, because light travels in a straight line the light from the top of the image travels through the aperture, still continues in a straight line, and end up at the bottom.

# data[].attributes.body
The iris and the aperture both work similarly because they can both be adjusted in size to control the amount of light entering.

# data[].attributes.body
The retina is a complex part of our eye, because it’s job is to turn light into signals about images the brain can understand.

# data[].attributes.body
When lights enters both of them, there is a focal point and a focal length.

# data[].attributes.body
The centre of the retina contain cone cells. There are three types of cone cells which detect red, green and blue light. These were the primary colours of light. Other colours that we see and the mixtures of these three colours. Those were the secondary colours. If all colours were mixed it would form a white light (a tertiary colour).

# data[].attributes.body
The point where all light rays meet is called the focal point.

# data[].attributes.body
The focal length is the distance between the lens and where all the light rays meet (focal point).

# data[].attributes.body
Pupils are holes located in the centre of iris, which allows light to strike the retina.

# data[].attributes.body
The focusing screw and the ciliary muscles perform similar roles.
Focusing screw: allows the user to adjust the focus for nearer or distant objects.
Ciliary muscles: which stretch or slacken the suspensory ligaments to adjust the shape of the lens.

# data[].attributes.body
One main large difference between the camera and eye is that cameras cannot focus light onto photosensitive surfaces by adjusting the shape of the lens.

# data[].attributes.body
When focusing the retina and parts of the pupils adjust their size, however in a camera the focus is changed by the movement of the lens.